How to Clean Knit and Flyknit Sneakers Without Damage

Why knit uppers need special care

Knit and Flyknit uppers are made from interlocking yarns that stretch to fit your foot. They're lightweight and breathable, but the same flexibility makes them vulnerable to harsh cleaning methods. Abrasive brushes, hot water, and wringing can pull loops, distort the shape, or cause snags.

The construction is different from leather or canvas. Instead of a single piece, the upper is often engineered with zones of varying density. That means water and soap can behave differently across the shoe. A gentle approach is key to keeping the fibers intact. If you want to understand the material better, see our guide to shoe upper materials.

• Avoid bleach and strong detergents
• Don't use hard brushes
• Never soak for long periods
• Skip fabric softeners; they leave residue that attracts dirt

Start with dry brushing

Before any water touches the sneaker, remove loose dirt. A soft bristle brush or an old toothbrush works well. Brush in short strokes along the direction of the knit. This prevents grinding dirt deeper into the fibers.

Pay attention to the outsole and the lower part of the upper. If there's dried mud, let it fully dry first. Then brush it off. This step alone can solve a large part of the cleaning job without any moisture. For general cleaning techniques, check our overall sneaker cleaning guide.

If you have a knit sneaker with a lot of texture, like a waffle or ribbed pattern, use a soft dry cloth to wipe between the grooves. You can also use a small vacuum attachment to pull out dust particles that are trapped in the weave.

Spot clean stains without soaking

For localized marks, use a small amount of mild liquid soap mixed with water. Dip a soft cloth or a cotton swab into the solution and dab the stain. Avoid rubbing hard, as that can spread the stain or stretch the knit.

If the stain is set, you can let the soap sit for a few minutes. Then, keep dabbing until it lifts. Rinse the area by dabbing with a cloth wet with plain water. Blot dry with a towel. For stubborn spots, try a baking soda paste; learn more in our guide to cleaning white knit sneakers with baking soda.

Dealing with oil or grease stains is trickier. Sprinkle cornstarch or talcum powder on the spot and let it sit for an hour. The powder absorbs the oil, then you can brush it away and proceed with the soap solution. This method is safe for knit because it avoids aggressive scrubbing.

Hand washing: the gentlest full clean

For a full refresh, hand washing is the safest route. Fill a basin with cold water and add a small amount of mild detergent. Submerge the sneakers and gently agitate with your hands. Let them soak briefly, but not more than ten minutes. Then, use a soft cloth to wipe the upper.

Rinse thoroughly with clean cold water until no soap remains. Then, press the water out by squeezing gently, but never twist or wring. Stuff the sneakers with paper towels or a shoe tree to help them hold their shape as they dry. Compare this method to machine washing in our washing machine guide.

If you need to wash the insoles, remove them and wash them separately. Knit uppers may also have internal padding that gets waterlogged. Allow extra drying time. You can accelerate by placing the sneakers near a fan, but avoid direct heat.

When machine washing is safe

While hand washing is ideal, many knit sneakers can survive a machine cycle if you follow precautions. Place them in a mesh laundry bag to protect both the shoes and the drum. Use cold water on a delicate cycle, and skip the spin. Use a mild detergent and no bleach.

The risk is that machine agitation can stretch and distort the knit, especially at the heel and toe. If you do machine wash, do it only occasionally and pair it with proper drying. Never put knit sneakers in the dryer; the heat can shrink or warp them. For drying specifics, see our fast drying guide.

Before machine washing, remove the laces and any removable insoles. Laces can be hand washed separately. To protect the toe box, you can stuff the shoes with white cloths or use a shoe form. Some people find that a pillowcase works as a substitute for a mesh bag if you tie it closed.

Drying and reshaping without damage

After washing, the way you dry matters as much as the washing itself. Air drying at room temperature is best. Place the sneakers in a well-ventilated area away from direct sunlight, radiators, or other heat sources. Heat can cause the knit to become stiff or deform.

To help the sneakers keep their shape, stuff them with white paper towels or a clean, dry shoe tree. This absorbs moisture and holds the contours. Change the stuffing once it becomes damp. Never use colored paper, as the dye can transfer. If you notice the knit losing its stretch, our stretch recovery guide can help you revitalize it.

Drying can take up to 24 hours. If you're in a hurry, use a fan to circulate air around the shoes. Rotate them occasionally. Do not use a hairdryer or place them on a vent. The knit may also develop a slight odor if left damp, so ensure they are fully dry before wearing.

Preventive care to keep knit clean

A little prevention goes a long way. Applying a water and stain repellent spray made for fabric can help keep dirt and liquid from soaking into the knit. Always test the spray on an inconspicuous area first, and reapply after a few washes or weeks of wear.

Rotating your sneakers so you don't wear the same pair two days in a row gives the knit time to air out and recover its shape. This also reduces the buildup of moisture and odor. For more on why rotation matters, see sneaker rotation needs.

If you live in a wet climate, consider storing your knit sneakers with a shoe tree or a paper towel inside to absorb residual moisture. When you take them off, leave them in a dry, airy place rather than a closed closet. Quick attention to spills immediately after they happen can prevent stains from setting.

What to pick for your use

Questions

Can I use bleach on knit sneakers?

No. Bleach can weaken the fibers and cause yellowing. Use a mild detergent or a dedicated shoe cleaner instead.

How often should I clean knit sneakers?

Depends on use. For daily wear, a spot clean every couple of weeks and a hand wash once a month is a good rhythm. If they get muddy, clean them sooner.

Can I put knit sneakers in the dryer?

No. Heat from a dryer can shrink, warp, or stiffen the knit. Always air dry at room temperature.

What should I do if my knit sneakers smell?

After drying, sprinkle baking soda inside and let it sit overnight. Then shake it out. You can also use an odor eliminator. For persistent smells, consider a deeper clean with a gentle detergent.

Are knit sneakers machine washable?

Some are, but it's risky. If you must, use a mesh bag, cold water, and delicate cycle. Skip the spin and never dry with heat. Hand washing is always safer.

How do I remove deep stains from knit?

Try a paste of baking soda and water, or a dedicated stain remover safe for fabrics. Apply gently and let it sit before rinsing. For grease, use cornstarch first to absorb the oil.

Can I use a steam cleaner on knit uppers?

Steam can help loosen dirt but carries a risk of heat damage. If you try it, keep the steamer moving and avoid concentrating heat on one spot. Always let the shoe dry fully afterward.