How To Flatten A Cotton Rug: Proven Techniques To Restore Shape And Remove Dents[Updated: December 2025]

To flatten a cotton rug, use these methods: 1. Flip the rug to relax curled corners. 2. Tape down the corners to keep them flat. 3. Back-roll the rug to restore shape. 4. Use a clothes iron on low heat. 5. Place the rug in sunlight for warmth. 6. Gently heat trouble spots with a hair dryer.

Another technique involves steam. Use a handheld steamer to lightly steam the affected areas while keeping the steamer a few inches away from the fabric. This process moistens the fibers and makes them easier to reshape. After steaming, smooth the rug with your hands to guide it into a flat position.

If the rug remains stubbornly wrinkled, consider washing it. Follow the care instructions for your cotton rug, then dry it flat on a clean surface. This washing method often relaxes the fibers, allowing them to regain their original shape.

After following these techniques, you may notice areas needing additional care. Addressing these spots promptly will ensure your cotton rug stays in prime condition. In the next section, we will explore maintenance tips to prevent future dents and keep your rug looking impeccable.

What You Will Learn?

What Causes Dents and Curvature in Cotton Rugs?

Various factors can cause dents and curvature in cotton rugs.

Improper storage methods
Heavy furniture placement
Humidity and moisture exposure
Vacuuming techniques
Poor-quality weaving

Understanding the causes of dents and curvature provides deeper insight into how to maintain and restore cotton rugs effectively.

Improper Storage Methods: Improper storage methods lead to dents and curvature in cotton rugs. Storing rugs incorrectly can cause creases and damage. For example, if a rug is folded rather than rolled, it may develop permanent wrinkles. In a 2019 study by the American Textile Manufacturers Institute, researchers found that rugs stored in humid environments were more prone to distortion.
Heavy Furniture Placement: Heavy furniture placement causes dents in cotton rugs. When heavy furniture sits on a rug for an extended period, it can create indentations. According to a 2021 article by the Rug Institute, moving heavy items regularly can prevent this issue. They recommend shifting furniture to redistribute weight and minimize prolonged pressure on specific areas.
Humidity and Moisture Exposure: Humidity and moisture exposure contribute to curvature in cotton rugs. Cotton fibers can absorb moisture from the air. This absorption can lead to swelling and warping. The National Institute of Standards and Technology (NIST) highlights that high humidity levels can significantly affect the shape durability of textile products like cotton rugs.
Vacuuming Techniques: Improper vacuuming techniques can lead to dents and uneven shapes in cotton rugs. Using a vacuum with a beater bar can cause fibers to pull out or become crushed. The Carpet and Rug Institute recommends using a suction-only vacuum for cotton rugs. This method preserves the rug’s structure and texture while effectively cleaning.
Poor-Quality Weaving: Poor-quality weaving affects the durability and shape retention of cotton rugs. Rugs with loose or uneven weaving are more prone to deformities. According to a case study published by the International Journal of Textile Science, low-quality rugs may exhibit curvature over time due to inadequate tension during the weaving process. Durable, well-constructed rugs prevent these issues.

Maintaining cotton rugs requires an understanding of various factors that influence their shape and durability.

How Do Heavy Objects Affect the Shape of a Cotton Rug?

Heavy objects can distort the shape of a cotton rug by creating permanent indentations and altering its original flatness. The effects of heavy objects on cotton rugs arise from the material’s properties and the pressure exerted by the weight.

Heavy objects exert pressure on the fibers of the rug. This pressure compresses the fibers, leading to two main effects:

Indentations: When a heavy object sits on a rug for an extended period, it can create visible indentations. These are areas where the rug fibers are compacted and unable to return to their original shape. A study by Smith et al. (2020) found that rugs exposed to heavy weights showed a significant reduction in fiber resilience over time.
Material Changes: Cotton fibers can become misshapen due to prolonged weight. The external pressure can lead to a breakdown of the fiber structure. According to research conducted by Jones (2019), repeated exposure to heavy items can cause irreversible changes in the texture of the fiber, making the area less plush.
Distribution of Weight: The shape distortion depends on how weight is distributed. A concentrated load can create deeper indentations compared to a more evenly distributed weight. Science indicates that the rug’s ability to recover from compression decreases with the weight’s concentration.
Hot and Humid Conditions: Under warm and humid conditions, the fibers may weaken further. The moisture can expand the fibers, and when compressed, they become more susceptible to deformation.

Because of these reasons, it is advisable to limit the placement of heavy objects on cotton rugs to maintain their shape and aesthetic appeal. Regularly rotating or rearranging heavy furniture can help minimize permanent damage to rug fibers.

What Environmental Factors Contribute to Deterring the Shape of Cotton Rugs?

Environmental factors that contribute to deterring the shape of cotton rugs include humidity, temperature fluctuations, and exposure to sunlight.

Humidity
Temperature Fluctuations
Exposure to Sunlight

The impact of these environmental factors extends beyond mere aesthetics; they can affect the durability and lifespan of cotton rugs as well.

Humidity:
Humidity directly influences the moisture content of cotton rugs. High humidity can lead to the absorption of moisture, causing rugs to swell and distort. Over time, this distortion may become permanent if the conditions are sustained. The American Society of Interior Designers reports that maintaining indoor humidity levels between 30% and 50% is essential for preserving textile integrity.

For instance, in tropical climates, cotton rugs may require frequent reshaping due to persistent high humidity levels. A case study conducted by Textile Research Journal (Smith, 2021) demonstrated that rugs stored in highly humid areas exhibited more wear, as fibers became saturated and lost their original shape.

Temperature Fluctuations:
Temperature fluctuations can cause cotton fibers to expand and contract. Extreme heat can lead to drying out, while cold temperatures may cause the fibers to harden and snap. The Environmental Protection Agency suggests that maintaining a stable indoor temperature helps manage the lifespan of textile products.

An example includes wool-rich environments, where drastic temperature changes can lead to deformation. A study by the Fibers Institute (Johnson, 2022) highlighted that rugs exposed to heated rooms in winter exhibited curling edges and uneven surfaces, a direct result of such temperature shifts.

Exposure to Sunlight:
Direct sunlight can lead to fading and degradation of cotton fibers, influencing how the rug maintains its shape over time. Ultraviolet (UV) rays break down the chemical structure of cotton, weakening it and making it more prone to wear. The U.S. Department of Energy emphasizes the importance of shading to prevent UV damage to textiles.

For example, a thorough investigation by the Journal of Textile Science (Lopez, 2020) showed that rugs placed in sunlit areas had distinct color fading and shape distortion over several months. This highlights the significant impact that sunlight exposure can have on the physical condition of cotton rugs.

By understanding these environmental factors, rug owners can take preventive measures to maintain the shape and quality of their cotton rugs.

What Are the Best Techniques to Flatten a Cotton Rug?

To flatten a cotton rug, several effective techniques can be employed. These methods help restore the rug’s shape and eliminate any dents or creases.

Steam Cleaning
Ironing
Weighting
Using a Humidifier
Professional Cleaning Services

Employing one or more of these techniques can help achieve optimal results in flattening a cotton rug. Here are detailed explanations for each method.

Steam Cleaning:
Steam cleaning is one method to flatten a cotton rug. This process involves using a steam cleaner to apply moisture and heat to the rug. The steam relaxes the fibers, allowing them to regain their original shape. According to the Carpet and Rug Institute, steam cleaning also removes dirt and allergens, making it a dual-purpose solution.
Ironing:
Ironing is another effective technique. To do this, place a thin cloth or towel over the rug, and use an iron set to a low or medium heat. The heat from the iron helps to soften the fibers, allowing them to return to their flat position. The American Cleaning Institute recommends this method as it provides a controlled application of heat that can effectively remove creases.
Weighting:
Weighting involves placing heavy objects on the rug to flatten it. This method requires time and patience, as the pressure gradually evens out the rug. For best results, distribute the weight evenly across the rug’s surface and leave it for several hours or overnight. Industry experts agree this method is simple and effective but may not work on very thick rugs.
Using a Humidifier:
Using a humidifier can help when dealing with wrinkles in cotton rugs. Increased humidity allows the rug fibers to absorb moisture and become more pliable. The International Journal of Textile Science notes that moisture can effectively reduce the stiffness of fibers, leading to a flatter rug. This method is particularly helpful in dry environments.
Professional Cleaning Services:
For persistent creases, professional cleaning services may be necessary. These services often use specialized equipment and techniques to restore rugs to their original condition. The Institute of Inspection, Cleaning, and Restoration Certification recommends this option, especially for valuable or delicate rugs that may require expert care.

By exploring these techniques, you can decide which method best suits your cotton rug and your unique situation. Each technique has its advantages and can be employed based on the rug’s condition and available resources.

How Can Household Items Be Used to Restore the Shape of a Cotton Rug?

Household items can effectively restore the shape of a cotton rug by utilizing moisture, weight, and heat. These methods can help eliminate creases and dents caused by furniture or folding.

Moisture: Using water can relax the fibers of the cotton rug. Lightly spraying the rug with water using a spray bottle is effective. This process allows the fibers to become more pliable, making it easier to reshape the rug. After spraying, gently work the fibers with your hands to restore their original shape.
Weight: Placing heavy objects on the rug can help flatten it over time. Items such as books or furniture can be used to apply consistent pressure on the creased areas. Ensure that the weight is distributed evenly to avoid causing new indentations or damage.
Heat: Applying heat can also revive the shape of a cotton rug. Use a steam iron at a safe distance from the fabric. The steam will help loosen the fibers. Alternatively, placing the rug in direct sunlight can naturally warm the fibers and encourage them to return to their original state.
Vacuuming: Regularly vacuuming the rug can help lift the fibers. A vacuum with a beater brush is particularly effective. This will help reduce the appearance of dents and maintain the rug’s fullness.
Stretching: Gently pulling the edges of the rug while it is damp can help restore its shape. Be careful not to stretch too hard, as this may distort the rug further.
Time: Allow the rug to sit flat with weights for several hours or overnight. This extended period will give the fibers time to hold their new shape.

By combining these household methods, you can efficiently restore the shape of a cotton rug while ensuring it remains in good condition.

What Effects Does Steam Have on Flattening a Cotton Rug?

Steam has a positive effect on flattening a cotton rug by helping to relax the fibers, allowing them to return to their original shape.

Effects of Steam on Cotton Rugs:
– Relaxation of fibers
– Removal of wrinkles
– Restoration of shape
– Potential damage to dye
– Temporary results

The impact of steam on flatting a cotton rug can vary based on several factors, including the rug’s material and construction.

Relaxation of Fibers:
Steam effectively relaxes the fibers of a cotton rug. This happens because the heat from the steam loosens the tightly packed fibers, allowing them to straighten out. According to a study by the Textile Research Journal in 2019, steam treatment can reduce fiber tension in fabric, enhancing its pliability.
Removal of Wrinkles:
Steam eliminates wrinkles in cotton rugs without the risk of crushing the fibers. The moisture penetrates, helping to smooth out creases while preserving the texture. A report by the American Home Furnishings Alliance noted that steam-cleaning methods used regularly can maintain the aesthetic appeal of such fabrics.
Restoration of Shape:
Using steam can help restore a cotto rug’s shape. The process helps reshape areas that may have been compressed or bunched. Many professionals recommend using a steamer to restore a rug after moving or washing. The overlap between this method and dry cleaning has been noted for prolonging the life of home textiles.
Potential Damage to Dye:
While steam can help in flattening the rug, it may also pose risks to the dye. High temperatures and moisture can cause certain dyes to run or fade. A study in the Journal of Color Science from 2017 found that some dye formulations are susceptible to heat, highlighting the need for caution when using steam.
Temporary Results:
Flattening effects achieved through steam may not be permanent. Continuous use and exposure to foot traffic may cause the rug to return to its wrinkled state. According to the National Floor Covering Association, maintaining a routine of steaming may be necessary to uphold the flatness over time.

When applying steam, ensure proper distance and coverage. This will prevent damage while achieving the desired results effectively.

How Can Heat Be Effectively Utilized in the Process?

Heat can be effectively utilized in various processes through methods such as heat exchangers, combined heat and power systems, and thermal energy storage systems. Each method enhances efficiency and reduces waste.

Heat exchangers transfer heat between two or more fluids while minimizing the loss of energy. For example, according to a study by Kakaç and Liu (2002), heat exchangers can recover up to 90% of waste heat from industrial processes. They serve numerous applications, such as in HVAC systems, power generation, and oil refining. The primary roles of heat exchangers include:

Energy recovery: They capture heat that would otherwise be released into the environment.
Process efficiency: They improve the overall efficiency of processes by reusing heat.
Temperature control: They help maintain desired temperatures in various systems.

Combined heat and power (CHP) systems generate electricity and utilize the heat produced in the process for heating, thus improving energy utilization. According to a report from the U.S. Department of Energy (2016), CHP can achieve efficiency levels ranging from 60% to 80%. Key features of CHP systems are:

Simultaneous generation: They provide both heat and power from a single source.
Reduced emissions: They lower carbon emissions by using fuels more efficiently.
Cost savings: They reduce energy costs for consumers and industries.

Thermal energy storage systems store excess heat for later use. They allow for better management of energy demand and supply by storing thermal energy, which can be released when needed. A study by Cansino et al. (2018) highlights that these systems can provide significant flexibility to energy systems. The main advantages include:

Load shifting: They enable the use of excess energy during off-peak hours.
Peak demand management: They reduce stress on energy systems during high-demand periods.
Enhanced renewable integration: They support the integration of solar and wind energy by storing heat for later use.

Utilizing heat effectively through these systems contributes to energy efficiency, cost savings, and environmental sustainability across various industries.

What Preventive Measures Can Be Employed to Maintain the Shape of Cotton Rugs?

To maintain the shape of cotton rugs, several preventive measures can be employed. These methods can help prevent curling, warping, or other distortions in the rug’s shape.

Regular rotation of the rug
Use of rug pads
Proper cleaning techniques
Avoidance of direct sunlight
Gentle handling during cleaning

Implementing these measures can significantly extend the life and appearance of cotton rugs. Now, let’s explore each measure in detail.

Regular Rotation of the Rug: Regularly rotating the rug helps in even wear and tear. This practice prevents specific areas from flattening more than others. For example, placement near furniture can lead to uneven pressure. By rotating the rug every few months, the stress on its fibers distributes evenly.
Use of Rug Pads: Rug pads provide cushioning and help keep the rug in place. A quality rug pad acts as a barrier between the rug and the floor, preventing slipping and minimizing movement that could lead to creasing. It also absorbs impact, reducing wear on the rug.
Proper Cleaning Techniques: Cleaning cotton rugs using gentle methods preserves their shape. Vacuuming regularly prevents dirt buildup. Spot cleaning with mild soap and water is advisable. Avoiding harsh chemicals is crucial as they may damage the fibers and alter the rug’s form.
Avoidance of Direct Sunlight: Continuous exposure to direct sunlight can fade and weaken cotton fibers. It is beneficial to avoid this by placing rugs in shaded areas or using window treatments. Protecting rugs from UV rays helps in maintaining both color and structure.
Gentle Handling During Cleaning: Rough handling while cleaning can distort the shape of cotton rugs. When lifting or moving, it is important to carry the rug flat. Additionally, during washing, it is best to follow specific care instructions to avoid agitation which may lead to shape loss.

Implementing these preventive measures can help maintain the shape, quality, and longevity of cotton rugs.

How Can Furniture Arrangement Minimize Dent Formation in Cotton Rugs?

Furniture arrangement can minimize dent formation in cotton rugs by distributing weight evenly, reducing contact pressure, and allowing for better airflow and recovery of the rug fibers. Increasing the space between heavy furniture and rugs also helps.

Distributing weight evenly: When furniture is arranged thoughtfully, the weight from each piece is spread across a wider area. This reduces the pressure that causes dents. For instance, placing heavier items on furniture coasters or pads alleviates direct pressure on the rug.
Reducing contact pressure: Heavy furniture can compress the fibers of a cotton rug, leading to visible indentations. By regularly rearranging furniture or using lighter materials, the frequency of those pressures can be minimized. It is recommended that furniture should not sit on a cotton rug for extended periods.
Allowing airflow and recovery: Arranging furniture with sufficient spacing allows for air circulation around the rug. Cotton fibers need airflow to maintain their shape and recover from compressions. A study by the Textile Research Journal (Smith, 2021) highlights that rugs benefit from adequate ventilation to regain their original texture.
Increasing space between heavy items: Providing more space between heavy furniture and rugs prevents prolonged contact that creates dents. For example, utilizing side tables or lighter decorative elements can take some weight off the rug, allowing it a chance to reset its fibers more easily.

By following these guidelines, you can effectively minimize the formation of dents in cotton rugs, preserving their appearance and extending their lifespan.

What Regular Cleaning Practices Should be Followed for Cotton Rug Maintenance?

To maintain cotton rugs effectively, follow these regular cleaning practices.

Vacuum regularly.
Spot clean stains immediately.
Rotate the rug periodically.
Hand wash or machine wash when necessary (check care label).
Avoid excessive sunlight exposure.
Use rug padding underneath.

These practices ensure the longevity and appearance of cotton rugs, yet opinions can vary on particular methods, especially regarding washing techniques. Some experts recommend hand washing to preserve the fibers, while others find machine washing effective for thorough cleaning. This variation creates room for debate on the best methods for specific rug types or household environments.

Vacuum Regularly: Vacuuming regularly helps remove dirt and debris from the cotton rug’s surface. According to the American Textile Manufacturers Institute, weekly vacuuming prevents dust particles from settling deep within the fibers. This practice can help maintain the rug’s color and texture over time.
Spot Clean Stains Immediately: Spot cleaning involves treating stains as soon as they occur. This action prevents the stain from setting in. Using a damp cloth and mild detergent, gently dab the stained area. The Carpet and Rug Institute recommends testing any cleaning solution on a hidden section of the rug first.
Rotate the Rug Periodically: Rotating your rug allows for even wear and fading. This practice helps balance the effect of foot traffic and sunlight exposure on different rug areas. Experts suggest rotating the rug every six months to maintain its shape and appearance.
Hand Wash or Machine Wash When Necessary: Proper washing of cotton rugs depends on their size and care label instructions. If machine-washable, use a gentle cycle and cold water. For hand washing, immerse the rug in a tub of water with mild detergent, scrub gently, and rinse thoroughly before drying. The Institute of Inspection, Cleaning, and Restoration Certification recommends caution with frequent washing as it can lead to damage over time.
Avoid Excessive Sunlight Exposure: Direct sunlight can fade colors and weaken fibers in cotton rugs. Positioning rugs away from direct sunlight or using window treatments can help protect them. The National Institute of Standards and Technology notes that exposure to UV rays can cause irreversible damage, diminishing the rug’s lifespan.
Use Rug Padding Underneath: Rug padding serves multiple purposes. It cushions the rug, enhancing comfort and preventing slipping. Additionally, it can absorb impact, which protects the rug’s fibers from wear. The Rug Institute notes that using the correct padding can extend the life of your rug significantly.

Incorporating these regular cleaning practices can greatly enhance the durability and aesthetic appeal of cotton rugs in any home.

What Additional Tips Can Help Sustain the Quality of Cotton Rugs?

To sustain the quality of cotton rugs, it is essential to follow specific care practices. Regular maintenance and mindful usage will help maintain their beauty and durability.

Regular Vacuuming
Spot Cleaning Stains
Using a Pad Under the Rug
Rotating the Rug
Avoiding Direct Sunlight
Professional Cleaning Every Few Years

To elaborate on these tips, I will provide detailed explanations for each one to ensure comprehensive care for cotton rugs.

Regular Vacuuming: Regular vacuuming helps remove dirt and debris from cotton rugs. This debris can accumulate and wear down the fibers over time. Using a vacuum without a beater bar is ideal to avoid damaging the pile.
Spot Cleaning Stains: Spot cleaning stains promptly prevents them from setting into the fabric. Blot any spills with a clean cloth and use a gentle soap solution if necessary. Avoid harsh chemicals that can damage the fibers.
Using a Pad Under the Rug: A pad under the rug provides cushioning and prevents slipping. It also protects the rug from wear and tear caused by friction with the floor. Choose a pad that is breathable and compatible with cotton rugs.
Rotating the Rug: Rotating the rug every few months ensures even wear. This practice helps prevent certain areas from becoming more worn than others due to foot traffic.
Avoiding Direct Sunlight: Prolonged exposure to direct sunlight can fade the colors of cotton rugs. To protect them, place rugs in shaded areas or use UV-protective window coverings.
Professional Cleaning Every Few Years: Engaging professional cleaning services every few years helps preserve the integrity of the rug. Professionals can deep clean without damaging fibers and may apply protective treatments to extend the life of the cotton rug. According to the American Cleaning Institute, professional cleaning can refresh colors and remove underlying dirt that regular cleaning misses.

By integrating these practices, one can significantly enhance the longevity and quality of cotton rugs, preserving their aesthetic and functional benefits for years to come.

How Can Proper Storage Techniques Enhance the Longevity of Cotton Rugs?

Proper storage techniques can significantly enhance the longevity of cotton rugs by preventing damage caused by environmental factors and physical stress. Effective storage practices include keeping rugs clean, rolling them correctly, controlling humidity and temperature, and using protective coverings.

Keeping rugs clean: Dust and dirt can cause fibers to wear down over time. Regular cleaning prevents the build-up of grime. A study by the Textile Research Journal (Smith, 2020) emphasizes that routine vacuuming can increase the lifespan of textiles by up to 30%.
Rolling rugs correctly: Storing cotton rugs rolled rather than folded helps maintain their shape. Rolling reduces creases and prevents stress on the fibers. When rolling, use a soft inner core to avoid pressure points. This method minimizes the risk of folding lines and damage.
Controlling humidity and temperature: Cotton is sensitive to moisture. High humidity can lead to mold and mildew growth. Ideal storage conditions include a cool, dry environment with a temperature between 60°F and 75°F. A study by the Journal of Textile Science (Johnson, 2021) supports that maintaining stable conditions can extend the life of cotton textiles.
Using protective coverings: Covering rugs with breathable materials, such as cotton or muslin, protects them from dust, pests, and sunlight. Avoid plastic covers, as they can trap moisture. Protective coverings keep the rug in a stable environment.

By implementing these storage techniques, you can effectively prolong the life of cotton rugs and maintain their appearance and functionality.

What Are the Best Practices for Regular Cotton Rug Care?

Regular cotton rug care involves specific practices to maintain its texture, appearance, and longevity. The best practices include the following:

Frequent vacuuming.
Spot cleaning stains promptly.
Deep cleaning using appropriate methods.
Rotating the rug regularly.
Protecting from direct sunlight.
Keeping it dry to prevent dampness.

The following sections provide detailed explanations for each best practice to ensure your cotton rug remains in excellent condition over time.

Frequent Vacuuming:
Frequent vacuuming ensures that dirt, dust, and debris do not settle into the fibers of the cotton rug. Regular cleaning keeps the rug looking fresh and helps prolong its life. Aim to vacuum at least once a week. Use a vacuum with a gentle setting to avoid damaging the fibers. According to a study by the Carpet and Rug Institute, regular vacuuming can extend the lifespan of rugs considerably.
Spot Cleaning Stains Promptly:
Spot cleaning stains promptly is essential for preventing permanent damage. You should use a gentle detergent mixed with water for cleaning spills. Apply the solution with a clean cloth and blot rather than rub to avoid spreading the stain. For tough stains, the Institute of Inspection, Cleaning and Restoration Certification recommends testing any cleaning product on a hidden area first to avoid color damage.
Deep Cleaning Using Appropriate Methods:
Deep cleaning involves thoroughly washing the rug to remove embedded dirt and allergens. You can use a professional cleaning service or clean it yourself using cold water and a mild detergent. Allow the rug to air dry completely to prevent mold and mildew. The American Cleaning Institute suggests deep cleaning cotton rugs once or twice a year, depending on usage and foot traffic.
Rotating the Rug Regularly:
Rotating the rug regularly ensures even wear. This practice is especially important if part of the rug is exposed to more sunlight or foot traffic than other areas. By rotating every six months, you can maintain its shape and prevent uneven fading or wear patterns. This method is recommended by the Oriental Rug Retailers Association as a simple step for maintaining rug aesthetics.
Protecting from Direct Sunlight:
Protecting cotton rugs from direct sunlight helps to prevent fading. UV rays can damage fibers and alter colors over time. Consider using window treatments or placing furniture strategically to shield the rug. According to the National Institute of Standards and Technology, UV-filtering window films or shades can significantly reduce sun damage.
Keeping It Dry to Prevent Dampness:
Keeping the rug dry is crucial to preventing mold and mildew. Ensure that the rug does not remain wet after cleaning. If it becomes damp due to spills or mopping, dry it promptly with towels and allow it to air out. The Centers for Disease Control and Prevention stress that moisture control is essential to reduce mold-related health risks.

By following these best practices, you can ensure that your cotton rug remains beautiful and functional for years to come.

Related Post:

How to Flatten a Cotton Rug: Proven Techniques to Restore Shape and Remove Dents