How to Clean White Knit Sneakers with Baking Soda

Why baking soda works on knit uppers

White knit sneakers are popular because they are lightweight and breathable, but the fabric shows dirt quickly. Baking soda is a mild abrasive that helps lift surface stains without the harshness of bleach or strong solvents. It also neutralizes odors, which is a bonus for daily wear.

Because knit is a flexible, often stretchable material, you need a cleaning method that is gentle enough to avoid fraying or distorting the threads. A baking soda paste is soft enough to work into the weave without pulling. For the best results, combine this treatment with a soft brush or a clean cloth.

For a broader approach to keeping your sneakers clean, see our guide on cleaning knit sneakers and for overall care, review how to clean sneakers.

Making the baking soda paste

To make the paste, mix three parts baking soda with one part water. Start with a couple of tablespoons of baking soda in a small bowl, then add water a teaspoon at a time until you get a thick, spreadable consistency. You want it to cling to the vertical surface of the upper without dripping.

If you prefer a slightly thicker paste, add more baking soda. For a thinner paste that is easier to spread, add a few extra drops of water. Do not make it runny, as excess moisture can soak into the knit and take a long time to dry.

You can also add a small drop of mild dish soap, but it is not required. The baking soda itself is effective on most surface stains.

Applying the paste to the upper

Before you start, remove the laces and any loose dirt from the sneaker. Use a dry brush to knock off dust and debris. Then, using your fingers or an old toothbrush, apply the paste directly to the stained areas. Work it in with small circular motions, but do not scrub hard. Let the paste sit for 15 to 30 minutes; for stubborn stains, you can leave it on for up to an hour.

Avoid applying the paste to the outsole or any rubber parts if you want to keep those areas separate, but it is fine if it gets on them. For the sole and the knit together, you can use the same paste.

For a more thorough cleaning that includes the sole, see our guide on whitening sneaker soles.

Rinsing and drying the right way

After the paste has had time to work, rinse the sneaker with cold water. Hold the upper under a gentle stream of water, or use a damp cloth to wipe away the baking soda residue. Make sure no white powder remains in the knit.

Do not wring or twist the sneaker. Instead, press gently with a clean towel to absorb excess water. Then stuff the sneaker with paper towels or a shoe tree to help it hold its shape while drying. Place it in a well-ventilated area away from direct sunlight and heat sources, which can cause yellowing or shrink the knit.

Air drying is essential. Do not use a dryer. For faster drying, you can place a fan nearby, but never use a heater. For more on drying, see how to dry sneakers fast.

Tips for stubborn stains and odor

If a stain does not come out after the first treatment, repeat the process. For oily stains, let the paste sit longer, up to an hour. You can also make a stronger paste by mixing baking soda with a little hydrogen peroxide, but test it on a hidden area first to ensure it does not bleach the fabric.

Baking soda also helps with odor. Leaving a thin layer of dry baking soda inside the sneaker overnight can absorb moisture and smells. In the morning, shake out the powder before wearing.

For ongoing care, consider protecting the knit with a water-repellent spray designed for fabrics. This can prevent stains from setting in. See our guide on waterproofing knit uppers for more.

Preventive care for white knit sneakers

The best way to keep white knit sneakers looking fresh is to clean them regularly. A quick wipe with a damp cloth after each wear removes surface dirt before it settles. Also, rotate your sneakers to give them time to air out between wears.

When you are not wearing them, store them in a cool, dry place. Stuffing them with tissue paper helps maintain their shape. Avoid leaving them in direct sunlight for long periods, as that can yellow the white knit.

For more on choosing durable and easy-to-clean sneakers, see our buying guides for best everyday sneakers and best court sneakers.

What to pick for your use

Questions

Will baking soda damage knit sneakers?

No, baking soda is a mild abrasive and is generally safe for knit fabrics. It can lift stains without harming the threads, but always test on a small area first. Avoid scrubbing too hard, as that can cause pilling.

How long should I leave the baking soda paste on?

For normal stains, 15 to 30 minutes is enough. For tougher marks, you can leave it on for up to an hour. Do not let it dry completely, as that makes rinsing harder.

Can I use baking soda on colored knit sneakers?

Yes, but be careful because baking soda can have a slight whitening effect. Test on an inconspicuous spot first. For colored knits, you might prefer a gentler cleaner without abrasive particles.

Should I use hot or cold water to rinse?

Always use cold water. Hot water can set stains and cause the knit to shrink or warp. Cold water is safer for the fabric and helps remove the baking soda residue.

Can I machine wash white knit sneakers?

Machine washing is not recommended because the agitation can stretch or damage the knit. Baking soda paste is a safer, more controlled method. If you must machine wash, use a delicate cycle and a mesh bag, but hand cleaning is better.

Will baking soda remove yellowing from white knit?

Baking soda can help with surface yellowing, but if the yellowing is caused by sun exposure or age, it may not fully reverse. For deep yellowing, consider a product formulated for whitening, but test it first.