An orthopaedic knee pillow can do wonders for your sleep quality and joint comfort — but to keep it effective, it needs regular cleaning and proper maintenance. Over time, sweat, dust, and skin oils can build up, affecting both hygiene and the pillow’s supportive properties.

Just like any other bedding accessory, caring for your knee pillow correctly helps it last longer, stay fresh, and maintain its ergonomic shape. Whether it’s made of memory foam, gel, or cotton, knowing how to clean and store it safely will ensure you keep enjoying its benefits night after night.

In this article, we’ll guide you step-by-step through how to clean and maintain an orthopaedic knee pillow, including the best washing methods, drying tips, and simple maintenance habits to preserve its comfort and quality.

 

How to Clean an Orthopaedic Knee Pillow?

Keeping your orthopaedic knee pillow clean is essential for maintaining both hygiene and long-term performance. Since the pillow comes into contact with your skin every night, it naturally collects sweat, oils, dust, and dead skin cells over time. Without regular cleaning, these residues can lead to unpleasant odours, bacterial growth, or even a loss of firmness and support.

Cleaning an orthopaedic knee pillow may seem tricky, especially when it’s made from memory foam or other delicate materials, but with the right method, you can preserve its freshness and shape easily. Below is a complete guide to cleaning your knee pillow safely and effectively.

Step 1: Check the manufacturer’s care label

Before doing anything, always read the care instructions provided by the manufacturer. Not all knee pillows are designed to be machine washed particularly those made with memory foam or gel-infused cores, which can be damaged by excessive moisture or heat.

The care label will indicate whether your pillow has a removable, machine-washable cover, or if it requires hand cleaning only. Following these instructions will prevent deformation or premature wear.

Step 2: Remove and wash the pillow cover

Most orthopedic knee pillows come with a removable fabric cover, usually made of cotton, polyester, or bamboo fibre. This cover is your first line of defence against dirt and sweat, so it should be washed regularly.

  1. Unzip the cover and remove it carefully from the pillow core.

  2. Machine wash the cover in cold or lukewarm water using a gentle cycle.

  3. Use a mild detergent that’s free from bleach or harsh chemicals, which can weaken the fabric over time.

  4. Once washed, air dry the cover completely before putting it back on. Avoid using a tumble dryer, as high heat may cause shrinking or damage elastic fibres.

For best results, wash the cover every two to three weeks or more frequently if you live in a warm climate or tend to sweat at night.

Step 3: Clean the memory foam or pillow core

The inner core of your orthopaedic knee pillow requires more delicate care, as submerging it in water can damage its structure. Instead, use spot cleaning to remove stains or odours safely.

Here’s how:

  1. Mix a solution of mild detergent and lukewarm water (a few drops of soap per cup of water).

  2. Dip a clean cloth or sponge into the soapy water and gently dab the affected area — never soak the foam.

  3. Use a separate damp cloth to remove soap residue.

  4. Finally, allow the pillow to air dry completely before use. Place it in a well-ventilated area, away from direct sunlight or heat sources, which can deform the foam.

If your pillow has a persistent odour, sprinkle baking soda over the surface, leave it for 20–30 minutes, then vacuum it off. Baking soda neutralises smells and absorbs excess moisture naturally.

Step 4: Disinfect and refresh occasionally

To maintain freshness between washes, lightly spray a mixture of water and white vinegar (50/50 ratio) on the surface of your pillow. Vinegar acts as a natural disinfectant and helps remove lingering odours.

Allow the pillow to air dry fully before putting the cover back on. Avoid spraying too much liquid just a fine mist is enough.

You can also use fabric freshening sprays or essential oils (like lavender or eucalyptus) for a pleasant scent, but apply them only to the removable cover, not the foam.

Step 5: Maintain cleanliness between washes

Prevention is the best way to keep your orthopaedic knee pillow clean. Here are a few simple habits to extend the time between deep cleans:

  • Always use a protective pillow cover to shield the foam from sweat and dust.

  • Keep your legs clean and dry before bed, especially during summer.

  • Store the pillow in a dry, ventilated place when not in use. Avoid damp areas, as moisture can lead to mould or bacteria growth.

  • Rotate or fluff the pillow occasionally to keep its shape and prevent pressure marks.

 

How to maintain your orthopaedic knee pillow for long-term use?

An orthopaedic knee pillow is an excellent investment for better sleep posture, reduced joint pain, and long-lasting comfort. However, like any other sleep accessory, its effectiveness and durability depend on how well you take care of it. Proper maintenance not only extends the pillow’s lifespan but also ensures it continues to deliver the same level of support and hygiene night after night.

Maintaining your orthopaedic knee pillow for long-term use involves regular cleaning, careful handling, and smart storage habits. Here’s how to keep your pillow in top condition for years to come.

Keep the pillow clean and fresh

The first step to maintaining your orthopaedic knee pillow is keeping it clean. Since it comes into contact with your skin nightly, it can accumulate sweat, oils, and dust over time. To prevent this, make sure to wash the removable cover regularly ideally every two to three weeks.

Most covers are machine washable, but always check the care label before washing. Use a gentle detergent and cold or lukewarm water to preserve the fibres. Avoid bleach or strong chemicals, as they can weaken the material or affect its softness. Air-dry the cover completely before putting it back on to prevent moisture build-up.

The pillow core, especially if made of memory foam, should not be machine-washed. Instead, perform spot cleaning when needed. Use a mild soap-and-water solution and gently dab the surface with a clean cloth. Never soak the foam or expose it to direct heat, as this can alter its shape and reduce its support.

Protect it with a cover or extra layer

Using a protective pillowcase or cover is one of the best ways to keep your knee pillow in perfect condition. A high-quality cover prevents sweat, dirt, and bacteria from reaching the foam. Choose a breathable material like cotton, bamboo, or polyester blends that allow air circulation and feel comfortable against the skin.

If you tend to sweat at night, consider adding a moisture-wicking layer. This will not only improve hygiene but also maintain the pillow’s freshness for longer periods.

Keep it in a dry and ventilated environment

Moisture is one of the biggest enemies of memory foam and orthopaedic pillows. Always keep your pillow in a dry, well-ventilated space to avoid mould or odour build-up. If you live in a humid climate, allow the pillow to air out every few days by placing it near an open window or fan.

Avoid storing your pillow in sealed plastic bags or damp drawers. Instead, use a breathable fabric storage bag when not in use. This allows air circulation while protecting it from dust and insects.

Avoid exposure to direct sunlight or heat

Although fresh air helps, excessive heat or sunlight can damage the foam’s structure. Direct exposure may cause the material to lose its elasticity or become brittle. If you need to dry your pillow after cleaning, place it in a shaded area with good airflow instead of under the sun or near a radiator.

Fluff and reposition regularly

Over time, your knee pillow may compress slightly due to daily use. To maintain its original shape and support, fluff or rotate it occasionally. If it’s a contoured or hourglass design, flipping sides can help distribute pressure evenly.

This simple action prevents permanent flattening and ensures consistent comfort for both knees. It also helps the foam recover from nightly compression, keeping it supportive for longer.

Maintain good hygiene and bedtime habits

Maintaining your pillow also means maintaining your bedtime routine. Always make sure your legs and skin are clean and dry before sleeping to prevent oils and sweat from transferring onto the pillow. Avoid using lotions or creams right before bed, as they can stain or degrade the cover material over time.

If you use essential oils or sprays for fragrance, apply them only to the removable cover, not directly on the foam. This prevents chemical reactions that could weaken the pillow’s integrity.

Replace when necessary

Even with perfect care, every pillow eventually wears out. The average lifespan of an orthopaedic knee pillow is about 18 to 24 months, depending on material quality and usage. Signs that it’s time to replace include reduced firmness, lingering odours, or visible deformation.

Replacing it on time ensures you continue receiving proper support for your joints, back, and hips without compromising comfort or posture.

 

How often should you replace your orthopaedic knee pillow?

Even the best orthopaedic knee pillow won’t last forever. Over time, daily use, body pressure, and exposure to moisture can affect its structure and performance. Replacing it at the right time is essential to ensure your pillow continues to provide proper support, comfort, and hygiene — three factors that directly impact your sleep quality and joint health.

In general, most orthopaedic knee pillows should be replaced every 18 to 24 months, depending on the material, frequency of use, and how well you maintain it. High-quality memory foam models tend to last longer, while cheaper or less dense foams may lose their shape more quickly.

One of the clearest signs it’s time for a replacement is loss of support. If your pillow feels flat, uneven, or doesn’t maintain its original contour between your knees, it’s no longer providing the alignment your spine and joints need. A worn-out pillow can actually contribute to discomfort or worsen knee, hip, or back pain instead of relieving it.

Another indicator is visible wear or damage. Stains, tears, and lingering odours — even after cleaning — suggest that the pillow’s hygiene and comfort have been compromised. Since the pillow absorbs sweat and body oils over time, it’s best to replace it once it becomes difficult to keep fresh and clean.

For people who use their orthopaedic knee pillow every night or live in hot, humid climates, replacing it closer to the 12- to 18-month mark may be ideal. On the other hand, occasional users can extend that lifespan with proper care, such as washing the cover frequently and air-drying the foam.

Regularly checking your pillow’s firmness and cleanliness ensures you get the most out of its lifespan while maintaining optimal joint support and hygiene.