Mold on shoes starts in the sole, seams, and insole where moisture gets trapped, and you can stop it with vinegar, baking soda, or commercial fungicide before it reaches the upper material or your feet
Shoes are one of the easiest places for mold to take hold because they sit in dark, damp places—closets, shoe racks, gym bags—and the inside stays moist long after you wear them. The mold usually begins in the insole or around the sole edges, where sweat and moisture collect. You can remove it yourself if you catch it early, but the method depends on the shoe material and how far the mold has spread.
The key is speed: mold spreads fastest in leather and canvas, and once it penetrates deep into the insole or lining, the shoe becomes harder to save. If you see fuzzy growth, dark spots, or smell a musty odor from your shoes, start treatment the same day.
Key Takeaways
- White vinegar kills surface mold on most shoe materials and costs less than fungicide sprays.
- Baking soda absorbs moisture and odor from inside the shoe and works best as a follow-up treatment after vinegar dries.
- Leather shoes need gentler handling than canvas or synthetic materials to avoid water damage and discoloration.
- Shoes must dry completely in sunlight or a warm, dry room before you wear them again, or mold will return within days.
- If mold has penetrated the insole or lining deeply, the shoe may not be salvageable and replacing it is safer than wearing it.
Cleaning mold off the outside and sole with vinegar
White vinegar is the first step for most shoes because it kills mold spores on contact and works on canvas, synthetic leather, rubber, and genuine leather. Mix equal parts white vinegar and water in a spray bottle or small bowl. For shoes with heavy mold, use undiluted vinegar—the smell is strong but fades as it dries.
Spray or wipe the moldy areas with a soft brush or cloth, working the vinegar into the seams, sole edges, and any visible growth. Let it sit for 10 to 15 minutes, then scrub gently with an old toothbrush to loosen the mold. Wipe away the dead mold and vinegar with a damp cloth, then dry the shoe completely with a towel. Do not soak the shoe—excess water pushes mold deeper into the material.
For leather shoes, test the vinegar solution on a hidden area first (like the inside heel) to make sure it does not discolor the leather. If the leather darkens, switch to the baking soda method instead.
Treating the inside with baking soda
After the outside is clean and dry, baking soda removes moisture and odor from inside the shoe where mold likes to hide. Sprinkle a generous amount of baking soda directly into the shoe, shake it around to coat the insole and sides, and let it sit overnight or for at least 8 hours. The baking soda absorbs sweat and moisture that would otherwise feed new mold growth.
In the morning, tap the shoe over a trash can to empty out the baking soda. If the shoe still smells musty, repeat the process for another night. You can also place a small open container of baking soda inside the shoe while it dries to speed up odor removal.
Do not mix baking soda with vinegar inside the shoe—the reaction creates moisture, which is the opposite of what you want. Use vinegar first on the outside, let it dry completely, then add baking soda to the inside.
Drying shoes completely to prevent mold return
Incomplete drying is the most common reason mold comes back. After cleaning, place the shoe in direct sunlight for at least 4 to 6 hours, or in a warm, dry room with a fan running. Sunlight kills remaining mold spores and dries the shoe faster than any other method. If you cannot use sunlight, place the shoe near a space heater or in front of a fan, but keep it at least 3 feet away from the heat source—direct heat can warp rubber soles and shrink leather.
Stuff the shoe loosely with newspaper or paper towels to absorb interior moisture and help it hold its shape. Change the newspaper every 2 to 3 hours if the shoe is very wet. Do not use a clothes dryer or hair dryer on high heat, as this can damage the shoe and create hot spots where mold can return.
The shoe is dry enough to wear when it feels dry to the touch inside and out, and the insole no longer feels cool or damp. This usually takes 24 to 48 hours depending on the shoe size and material.
Using commercial antifungal products for stubborn mold
If vinegar and baking soda do not stop the mold, or if the mold returns within a week, a commercial antifungal spray or powder may work better. Products like Lysol Antifungal Spray or antifungal foot powder (the kind used for athlete's foot) kill mold spores more aggressively than vinegar. Follow the product label for how long to let it sit and whether the shoe needs to dry afterward.
Spray or dust the product on the moldy areas and inside the shoe, then let it dry in sunlight or a warm room. These products are stronger than vinegar, so use them in a well-ventilated area and avoid breathing the spray directly. Wear gloves if your skin is sensitive.
Commercial products work best on rubber soles and synthetic materials. Test them on leather first, as some can stain or discolor it.
When to throw the shoes away instead of cleaning them
If the mold has spread deep into the insole, lining, or upper material, or if the shoe smells so strongly of mold that vinegar and baking soda do not help after two treatments, the shoe is not worth saving. Mold that has penetrated the insole is nearly impossible to reach and remove completely, and wearing the shoe will expose your feet to mold spores every time you put it on.
Signs the shoe should be discarded: the insole feels spongy or soft (a sign the mold has broken down the material), the smell returns within days of cleaning, or visible mold appears again in the same spot after two weeks. Shoes are cheaper than a fungal foot infection, which can take months to clear.
Preventing mold from coming back
Mold returns when shoes stay damp or in a humid, dark space. Store shoes in a dry closet or shoe rack with air circulation, not in a sealed plastic bin or damp basement. After wearing shoes, remove the insole and let it air dry separately. If your feet sweat heavily, spray the inside of the shoe with antifungal foot powder or a light mist of vinegar solution once a week, then let it dry completely before wearing.
Keep a small open container of baking soda or activated charcoal in your shoe storage area to absorb ambient moisture. If you live in a humid climate, use a dehumidifier in the closet or room where you store shoes. Rotate your shoes so each pair has at least one full day to dry between wears.
Frequently Asked Questions
Can I wear shoes while they still have a slight musty smell after cleaning?
No—the smell means moisture or mold spores are still present inside. Wear the shoe and your body heat and sweat will reactivate the mold. Let the shoe dry for another full day in sunlight or a warm room, then test it again. If the smell persists after two complete drying cycles, the mold has likely penetrated too deep to remove.
Is it safe to wear shoes that had mold if I cleaned them thoroughly?
Yes, if you cleaned them thoroughly and they dried completely. Mold spores are killed by vinegar and sunlight, and once the shoe is dry, new mold cannot grow. The risk comes only if moisture returns before you wear them, so store them in a dry place after cleaning.
What if mold is only on the outside rubber sole?
Rubber soles are the easiest to clean because mold does not penetrate rubber the way it does canvas or leather. Scrub the sole with a brush and vinegar solution, rinse with a damp cloth, and dry it in the sun. One treatment is usually enough for rubber-only mold.
Can I use bleach to kill mold on shoes?
Bleach kills mold but will damage or discolor most shoe materials, especially leather, canvas, and dyed synthetics. Stick with vinegar or commercial antifungal products instead. Bleach is useful only for white rubber soles if you do not mind slight discoloration.
How long does it take for mold to come back if I do not fix the storage problem?
If the shoe goes back into a damp closet or sealed container, mold can return within one to three weeks depending on humidity and how much moisture the shoe absorbed. Fix the storage environment at the same time you clean the shoe, or the mold will straightforward grow again.