How to Clean Memory Foam Insoles Step by Step

When to clean memory foam insoles

Memory foam insoles absorb moisture and oils from your feet over time, which can lead to odor and a breakdown of the foam's supportive structure. As a general rule, if you wear the same pair of shoes daily, plan to clean the insoles about once a month. If you notice a smell or visible staining before that, clean them sooner.

The American Podiatric Medical Association emphasizes that keeping footwear dry and clean supports overall foot health. Regular cleaning not only keeps the shoes fresh, it also helps the foam retain its shape. Check whether your insoles are removable first. Many shoes have fixed insoles; if yours are glued in, you may need to clean them in place or follow the manufacturer's instructions. You can learn more about identifying removable and fixed designs in our removable insole guide.

Prepare your supplies

You only need a few basic items: a small basin or sink, lukewarm water, a mild liquid soap such as dish soap or a gentle hand soap, a soft cloth or sponge, and a clean, dry towel. Avoid harsh detergents, bleach, or fabric softeners, as these can break down the foam and reduce its cushioning.

Optional tools include a soft-bristled brush for stubborn spots and a microfiber cloth for final drying. If your shoes have a removable liner or sockliner, take that out first so you can access the insole directly. For shoes with fixed insoles, you may need to clean the entire interior instead; see our guide to cleaning inside shoes for that approach.

Spot clean the surface

Start by removing loose dirt or debris. Gently tap the insole over a trash bin or use a soft brush to lift off dust. Then, dip your cloth or sponge in the soapy water and wring it out well. The cloth should be damp, not soaking, because excess water can saturate the foam and make drying difficult.

Work in small circular motions over the top surface of the insole, paying extra attention to the heel and forefoot areas where sweat and oils accumulate. For stubborn stains, let the soapy solution sit on the spot for a minute, then scrub gently with a soft brush. Avoid pressing too hard, as aggressive scrubbing can compress the foam and change its shape.

• Use lukewarm water, not hot water, to avoid damaging the foam.
• Use a mild soap that is free of dyes and fragrances if possible.
• Do not submerge the insole in water for long periods.

Rinse and press out excess water

After spot cleaning, rinse the insole under a gentle stream of cool or lukewarm water. Hold it at an angle so the water runs off the surface rather than soaking into the foam. Use your fingers to lightly rub the surface to remove any soap residue. Continue rinsing until the water runs clear and no suds remain.

Once rinsed, press the insole between two clean towels to remove excess water. Lay one towel flat, place the insole on top, and cover it with the second towel. Press down firmly with your hands or roll the towel up gently. Do not wring or twist the insole, as that can tear the foam or cause it to deform.

Dry the insoles properly

Air drying is the only safe method for memory foam. Place the insoles on a dry towel in a well-ventilated room at room temperature. Avoid direct sunlight, radiators, hair dryers, or any other heat source, because heat can cause the foam to shrink, harden, or lose its shape. Drying typically takes 12 to 24 hours, depending on humidity.

To speed up drying, you can place a fan nearby or set the insoles on a drying rack with good airflow. Make sure both sides are exposed to air. If you are in a hurry, you can also place the insoles near, but not on top of, a dehumidifier. Never put memory foam in a clothes dryer, even on a low heat setting. For more on safe drying techniques, see our guide to drying wet shoes properly.

Avoid these common mistakes

The most common mistake is tossing memory foam insoles into the washing machine. The agitation and spin cycle can break down the foam's cell structure, turning it flat and uncomfortable. Similarly, do not use a dryer, as heat ruins memory foam. If you cannot remove the insoles from your shoes, do not try to wash the whole shoe in a machine; that can damage both the shoe and the insole.

Another mistake is using too much soap or harsh chemicals. Strong cleaners can leave a residue that irritates your skin and breaks down the foam. Stick to a mild soap and rinse thoroughly. Also, do not put damp insoles back into shoes immediately. Trapped moisture creates an environment where odor-causing bacteria thrive. Let them dry completely first.

When to replace instead of clean

Even with regular care, memory foam insoles wear out. If cleaning no longer removes the odor, or if the foam feels flat and no longer springs back when you press on it, it is time for a replacement. The same applies if you see cracks, crumbling, or visible thinning. Worn insoles lose their cushioning and support, which can lead to foot discomfort.

If your shoes have removable insoles, you can often buy replacement insoles or use aftermarket ones. If the insoles are fixed and worn out, the shoes themselves may be nearing the end of their life. For guidance on choosing shoes with supportive, replaceable footbeds, browse our best walking shoes guide or our best slippers guide. Also see our insole materials and replacement guide for what to look for.

What to pick for your cleaning routine

Questions

Can you put memory foam insoles in the washing machine?

No. The washing machine's agitation can break down the foam and cause it to lose its shape. Always hand wash memory foam insoles with a mild soap and water.

How long does it take for memory foam insoles to dry?

At room temperature with good airflow, memory foam insoles generally dry in 12 to 24 hours. Use a fan to speed up the process, but never use a clothes dryer or hair dryer.

What is the best way to remove odor from memory foam insoles?

After cleaning and drying, you can sprinkle a thin layer of baking soda on the insoles and let it sit overnight, then brush it off. Baking soda absorbs moisture and neutralizes odor. See our baking soda deodorizing guide.

How often should I clean memory foam insoles?

If you wear the shoes daily, clean the insoles about once a month. If you sweat heavily or wear them for long shifts, consider cleaning them every two weeks.

Can I use bleach or disinfectant on memory foam insoles?

No. Bleach and strong disinfectants can damage the foam and leave harmful residues. Use a mild soap and water, and for disinfection, use a diluted vinegar spray or an antibacterial spray made for shoes.