How to Clean On Cloud Sock Liners

Why the sock liner needs regular cleaning

The sock liner inside your On Cloud sneaker sits directly against your foot. It absorbs sweat, oils, and dead skin with every wear. Over time, that moisture can become a breeding ground for odor-causing bacteria and even affect the liner's cushioning. The American Academy of Orthopaedic Surgeons emphasizes foot hygiene to prevent skin problems, and a clean liner is part of that equation.

A dirty sock liner also loses grip. When it becomes compressed or slippery from residue, your foot can slide inside the shoe, which may increase friction and lead to blisters. Keeping the liner clean helps it stay in place and support your arch as intended.

On Cloud designs many models with removable sock liners, making them easier to refresh. If you're shopping for a new pair, the best On sneakers guide highlights options with breathable and easy-care liners.

How to remove the sock liner safely

Start by loosening the laces and opening the tongue wide so you can reach inside the shoe. Grip the liner at the heel edge, where it usually has a slight curve. Pull upward slowly and evenly. It should lift out without much resistance because On uses a removable design on many models.

If you feel any resistance, check that you are not catching the liner on the stitching or a heel counter. Never yank hard, as that can tear the liner or the shoe's interior. Once the liner is out, set it aside. You can also remove both liners at once to keep the pair together.

This step is also a good moment to inspect the liner for wear. If the cushioning is flattened or cracked, it may be time to replace it. Our removable insoles guide explains how to tell when a liner has lost its support.

Hand washing your On Cloud sock liner

Hand washing is the gentlest way to clean your sock liner and preserves its shape. Fill a basin with cool water and add a few drops of mild detergent, such as a gentle laundry soap or dish soap. Avoid bleach or harsh chemicals, which can break down the liner's foam.

Submerge the liner and let it soak for about ten minutes. Then use your fingers to gently scrub any stained areas, focusing on the heel and forefoot where sweat collects. Do not twist or wring the liner, as that can deform the padding.

Rinse the liner under cool running water until the water runs clear and no soap remains. Press it between your palms to remove excess water, but do not squeeze it tightly. Repeat the soak and rinse if the liner is particularly dirty.

For a deeper clean, you can use a soft-bristled brush, like an old toothbrush, on the surface. This works well for textured liners that trap dirt. The National Institute for Occupational Safety and Health notes that good hygiene reduces skin irritation, so thorough rinsing is important.

Machine washing: safe when done right

If you prefer machine washing, place each sock liner in a mesh laundry bag to protect it from snagging. Use cold water on a gentle or delicate cycle with a small amount of mild detergent. Do not add fabric softener, because it can coat the liner and reduce its moisture-wicking ability.

After the cycle finishes, remove the liners from the bag immediately. They will be wet and heavy. Do not put them in the dryer. High heat can damage the foam and cause the liner to shrink or lose its cushioning.

Some On sneaker models have liners that are not designed for machine washing. If you are unsure, check the care tag inside the shoe or consult the manufacturer's recommendations. The how to wash sneakers in a washing machine guide has general tips that also apply to removable liners.

Drying and putting the liner back

Air drying is the only safe method. Lay the liners flat on a clean towel in a well-ventilated area, away from direct sunlight and heat sources. Sunlight can cause the foam to degrade and the fabric to fade. Avoid placing them on radiators or using a hair dryer, as heat can warp the liner.

It is essential to wait until the liner is completely dry before reinserting it. A damp liner can breed mildew and cause an unpleasant smell. Depending on humidity, this can take several hours or overnight. If you need them sooner, you can speed up drying by using a fan, but never heat.

To reinsert, slide the liner back into the shoe, starting at the toe and pressing the heel into place. Make sure it lies flat with no wrinkles. If the liner has a printed logo or arch shape, align it with the shoe's interior. Once it is seated, lace up and walk normally to settle it.

For tips on maintaining the rest of your sneakers, see the how to clean sneakers guide and the sock-liner-vs-insole explainer.

What to pick for your use

Questions

How often should I clean On Cloud sock liners?

It depends on how often you wear them. If you wear the shoes daily, cleaning the liners every two to four weeks helps control odor and maintain support. For occasional wear, every month or two may be enough. If the liner looks dirty or starts to smell, clean it sooner.

Can I use bleach on On Cloud sock liners?

No. Bleach and harsh chemicals can break down the foam and fabric, destroying the liner's cushioning and causing discoloration. Use a mild detergent and cool water for the best results.

Is it safe to dry On Cloud sock liners in the dryer?

No. The heat from a dryer can damage the foam, causing it to compress, warp, or lose shape. Always air dry the liners at room temperature, away from direct heat.

Can I put On Cloud sock liners in the washing machine with other clothes?

Yes, but use a mesh laundry bag to protect them. Wash on a cold, gentle cycle with mild detergent. Never wash with heavy items like jeans that can rub against the liners and cause fabric wear.

What should I do if my On Cloud sock liner is stained?

Spot treat the stain with a small amount of mild detergent and a soft brush before washing. Let it sit for a few minutes, then rinse thoroughly. For tough stains, repeat the process or soak the liner in cool water with detergent for a longer period.

How do I know when it's time to replace the sock liner?

If the liner feels flat, has visible cracks, or no longer returns to its shape after compression, it has lost its support. Also, if washing does not remove a persistent odor, it may be time to replace it. Check our How to Check if a Sneaker Insole Is Removable for more signs.