How to Get Mildew Out of Sneakers: Proven 2026 Guide

By Sarah Mitchell · December 18, 2025

Immediate Action (first 5 minutes)

I pulled my favorite Nike Pegasus 39s out of my gym bag last Tuesday and nearly gagged. They smelled like a damp basement. If you leave your sweaty shoes in a dark, enclosed space for even 48 hours, mildew spores will start colonizing the mesh and foam. You need to act fast. Don't just throw them in the closet. Take them outside immediately.

When your landlord inspects next week and you realize your entryway smells like a swamp because of your damp running shoes, panic sets in. Don't just spray them with Febreze. That only masks the problem and creates a sickeningly sweet mildew perfume.

Grab a stiff-bristled dry brush. I use the standard Reshoevn8r medium brush. Scrub the exterior vigorously to knock off any loose, dry spores. Do this outside so you don't spread fungal spores all over your living room rug. Next, place the sneakers in direct sunlight for at least 30 minutes. UV rays naturally kill a significant portion of surface-level mildew. This isn't a complete fix. It just stops the bleeding while you gather your supplies.

What You'll Need (tools/products)

I've tested dozens of concoctions over my ten years of restoring deadstock and beat-up daily drivers. You don't need a chemistry degree, but you do need the right tools. This isn't the cheapest option, but buying dedicated sneaker cleaners saves your shoes from falling apart.

Here is my exact loadout for tackling fungal invasions:

White Vinegar (Distilled): A standard 16 oz bottle from the grocery store costs about $3. The acetic acid kills 82% of mold species.
Sneaker Cleaning Solution: I swear by the Angelus Easy Cleaner Kit ($15-20). It lifts dirt without stripping the glue holding your midsole together.
Soft and Medium Brushes: You'll need a soft horsehair brush for uppers and a medium synthetic brush for the rubber outsoles. Reshoevn8r sells a great 3-brush kit for around $25.
Microfiber Towels: Grab a pack of 12 from Amazon for $10. Paper towels just shred and leave white lint stuck in your shoe's crevices.
Baking Soda: A standard 16 oz box from Arm & Hammer costs $1. It absorbs lingering odors and acts as a gentle abrasive.
Spray Bottle: Any cheap $2 plastic trigger sprayer will do.
Cedar Shoe Trees: Optional, but highly recommended. A pair of Stratton cedar shoe trees runs about $20 and they work wonders for maintaining shape while drying.

Step-by-Step Removal (4-7 steps)

I'll be honest, this takes elbow grease. You can't just wipe mildew away and expect it to vanish. The roots dig deep into the fabric weave. Follow these steps exactly as I've laid them out.

Step 1: Create and Apply the Vinegar Solution

Mix equal parts distilled white vinegar and cool water in your spray bottle. Shake it well. Spray the entire affected area of the sneaker until it's damp, but not dripping wet. Let it sit for exactly 15 minutes. The acid needs time to penetrate the fibers and destroy the mildew's cellular structure. Don't skip the waiting period.

Step 2: Scrub with Dedicated Cleaner

After the vinegar soak, apply your Angelus sneaker cleaner directly to your medium brush. Dip the brush tips in a bowl of cool water. Scrub the midsoles and rubber parts in tight, circular motions. Switch to the soft horsehair brush for the mesh or knit uppers. When you scrub the mesh, use a back-and-forth motion rather than circles to avoid fraying the delicate threads. If you're working on a knit upper like Primeknit or Flyknit, be exceptionally gentle. The fibers trap mildew deep inside the weave. You'll see brown or grey suds forming. That's the mildew and dirt lifting out of the material. Wipe away the suds frequently with a damp microfiber towel.

Step 3: Treat Stubborn Stains with a Paste

Sometimes the dark spots refuse to budge. When that happens, I make a thick paste. Mix two tablespoons of baking soda with one tablespoon of water. Smear this paste directly onto the remaining mildew stains. Let it dry completely, which usually takes about 45 minutes in a well-ventilated room. Once it's crusty, brush it off with your dry medium brush. The baking soda pulls the pigment out of the fabric as it dries.

Step 4: Rinse and Wipe Down

Dampen a clean microfiber towel with plain cold water. Wipe down the entire shoe to remove any leftover cleaning residue. Leftover soap attracts new dirt. Make sure you get into the tongue gussets and around the eyelets.

Step 5: Air Dry Properly

Stuff the toe box with crumpled up newspaper or insert your cedar shoe trees. Never put wet sneakers in the dryer. The high heat will melt the polyurethane glue and warp the rubber. Place them in front of a standard 16-inch oscillating fan. If you live in a humid climate like Florida or Louisiana, a simple fan might not be enough. Consider placing the shoes in a room with a dehumidifier running on the continuous setting. Keep the ambient room temperature around 70°F to 75°F for optimal drying without damaging the glue. Let them dry for a full 24 hours.

Alternative Methods (2-3 backup methods)

Sometimes the vinegar trick just doesn't cut it. I've had to pull out the big guns for shoes that sat in a flooded garage for a week. Here are two backup methods I rely on when the standard protocol fails.

Method 1: 70% Isopropyl Alcohol

Alcohol evaporates incredibly fast and kills fungi on contact. Pour 70% isopropyl rubbing alcohol into a spray bottle. Mist the inside and outside of the shoe. I prefer 70% over 90% because the extra water content actually keeps the alcohol on the surface longer, allowing it to penetrate the spore walls before evaporating. Wipe it down after 10 minutes. This works exceptionally well on leather sneakers like the Air Force 1, but it can dry out suede, so avoid using it on fuzzy materials.

Method 2: Oxygen Bleach Soak

For white canvas shoes like Converse Chuck Taylors, oxygen bleach is a lifesaver. Dissolve one scoop of OxiClean Versatile Stain Remover in a gallon of warm water (around 90°F). Submerge the shoes completely. Let them soak for exactly one hour. Any longer and you risk weakening the cotton fibers. Rinse them thoroughly with cold water afterward.

Method Comparison

Method	Best For	Cost	Drying Time
Vinegar & Sneaker Cleaner	Mesh, Knit, Synthetic Leather	$15-25	24 Hours
70% Isopropyl Alcohol	Smooth Leather, Rubber Soles	$4-8	2 Hours
Oxygen Bleach Soak	White Canvas, Cotton Uppers	$10-15	36 Hours

Prevention Tips

Killing the mildew is only half the battle. You have to stop it from coming back. I learned this the hard way after ruining a pair of $180 Ultraboosts.

First, never store damp shoes in a closed gym bag. Buy a ventilated mesh laundry bag specifically for your post-workout shoes. It costs about $8 and allows air to circulate during your commute home.

Second, control the moisture inside the shoe. Sweat creates a perfect breeding ground for fungi. I drop two silica gel packets into each shoe immediately after taking them off. You can buy a bulk pack of 100 desiccant packets on Amazon for $12.

If you have kids who track mud everywhere and leave their wet cleats in the mudroom, you need a dedicated shoe drying rack. The PEET Original 2-Shoe Electric Dryer costs around $45 and uses gentle thermal convection to dry footwear overnight without any noisy fans. It's a game-changer for busy households.

Finally, rotate your daily runners. Don't wear the same pair two days in a row. Giving the foam and insoles a full 24 hours to completely dry out between wears drastically reduces bacterial and fungal growth. If your feet sweat heavily, swap out the factory insoles for moisture-wicking alternatives like the Superfeet Carbon insoles ($55).

FAQ

Can I put mildewed sneakers in the washing machine?

I strongly advise against throwing mildewed shoes in the washing machine. The agitation can warp the structural integrity of the heel counter and melt the adhesives holding the sole together. Furthermore, you risk spreading the mildew spores to your washing machine drum, which will then transfer to your regular laundry. Hand washing with the methods above is always the safer route.

Will bleach ruin my white sneakers?

Chlorine bleach will absolutely ruin most modern sneakers. It causes a chemical reaction with the synthetic rubber and polyurethane used in midsoles, turning them a permanent, ugly yellow. It also weakens cotton and canvas fibers, making them brittle and prone to tearing. Stick to oxygen-based bleaches like OxiClean, which are color-safe and much gentler on structural adhesives.

How do I get the mildew smell out if the stains are gone?

If the visual stains are gone but the damp basement odor lingers, the spores are likely hiding deep inside the insole foam. Remove the factory insoles and wash them separately in a sink with warm water and dish soap. Sprinkle a generous layer of dry baking soda inside the shoe cavity and let it sit overnight. Vacuum out the powder the next morning, and the smell should be completely neutralized.

Does sunlight kill mildew on shoes?

Direct sunlight is a fantastic natural disinfectant because ultraviolet rays destroy the DNA of mold and mildew spores. However, leaving dark-colored or leather sneakers in baking hot sun for hours can cause the colors to fade and the leather to crack. I recommend using sunlight in short 30-minute bursts for initial spore killing, then moving the shoes to a shaded, well-ventilated area with a fan to finish the drying process.