Mildew · Cotton
Mildew Smell on Cotton — How to Get It Out
Mildew smell on cotton clothes comes from mold spores that thrive in damp fabric, and you can eliminate it with white vinegar and baking soda before a hot wash. Cotton is durable enough to handle aggressive odor treatment, so you can use heat and alkaline boosters without worry. The key is to kill the spores and neutralize the musty odor at the same time.
- Time1 hr 30 min
- DifficultyEasy
- MaterialCotton
Watch out
TipCotton can handle hot water and baking soda without damage, so don't be afraid to use heat and alkaline boosters for mildew.
WarningIf the cotton is dyed in dark or bright colors, test the vinegar soak on a hidden seam first to make sure the color doesn't bleed.
TipNever leave damp cotton in the washer or a hamper — mildew can take hold in as little as 24 hours.
Do this
Soak in vinegar water
Fill a basin or your washing machine drum with hot water (hottest tap setting, about 130 °F) and add 1 cup of white vinegar. Submerge the cotton items completely and let them soak for 30 minutes to kill mold spores and loosen the odor.
If the mildew smell is very strong, use 2 cups of vinegar and soak for up to an hour.
Add baking soda and agitate
Sprinkle 1/2 cup of baking soda directly onto the soaking clothes. Agitate by hand or run a short wash cycle (5 minutes) to distribute the baking soda, which neutralizes remaining odors.
Wash on hot with detergent
Drain the soak water and run a full hot-water wash cycle with your usual laundry detergent. Cotton can handle high heat, which helps finish killing any lingering spores.
Dry completely in sunlight or dryer
Dry the clothes completely in direct sunlight if possible, or tumble-dry on high heat. Any remaining dampness will let mildew return, so make sure everything is bone-dry before you put it away.
Sunlight has natural bleaching and antimicrobial properties that help eliminate stubborn mildew odors from white and light-colored cotton.
Common questions
What if the mildew smell comes back after washing?+
The spores weren't fully killed, or the fabric didn't dry completely. Repeat the vinegar soak and baking soda wash, then dry in direct sunlight or on high heat in the dryer. Store the clothes only when they are completely dry.
Can I use bleach instead of vinegar on white cotton?+
Yes, you can use 1/2 cup of chlorine bleach in hot water for white cotton. Bleach kills mold spores very effectively. Never mix bleach and vinegar — choose one or the other.
Will this method work on old mildew smell that's been there for months?+
It usually will, but you may need to soak twice or add a second round of baking soda. Very old mildew can sometimes leave permanent discoloration even after the smell is gone.
Can I skip the soak and just add vinegar to the wash cycle?+
You can add 1 cup of vinegar to the rinse cycle, but a soak is more effective for heavy mildew odor. The longer contact time gives the vinegar a better chance to kill spores embedded in the fibers.
Same stain, other materials
MildewCarpet
How to Get Mildew Out of Carpet
Mildew on carpet happens when moisture gets trapped in the fibers, and you need to kill the spores and lift the stain before it spreads. White vinegar kills mildew, baking soda absorbs odor, and a stiff brush lifts the residue from deep in the pile. Work quickly—mildew weakens carpet backing and can spread to the pad underneath.
MildewLeather
Mildew on Leather — How to Get It Out
Mildew on leather shows up as fuzzy gray or white patches that smell musty, and you can remove it with isopropyl alcohol and careful wiping. Leather is porous and can't tolerate soaking or harsh scrubbing, so work gently and let it dry completely between steps. Act quickly—mildew eats into the hide and weakens it over time.
MildewUpholstery
Mildew on Upholstery — How to Get It Out
Mildew stains on upholstery come from trapped moisture and mold spores, and you can remove them with white vinegar, baking soda, and careful brushing. The key is to kill the mildew, lift the stain, and dry the cushion or fabric completely so it doesn't return. Always test your cleaning solution on a hidden spot first — upholstery fabrics vary widely in how they tolerate moisture and acid.
MildewWood
Mildew Stains on Wood — How to Remove Them
Mildew stains on wood appear as dark gray or black patches caused by surface mold, and you can remove them with white vinegar and a scrub brush if you act before the spores penetrate deep into the grain. Unfinished wood needs more aggressive treatment than sealed or painted surfaces, so adjust your pressure and product strength accordingly.
More stains on cotton
BloodCotton
Blood on Cotton — How to Get It Out
Blood stains come out of cotton easily if you act quickly and use cold water—hot water will set the protein permanently. Cotton is durable and can handle scrubbing, soaking, and repeated treatment, so even dried blood usually responds well to enzyme soap and patience.
BloodCotton
Blood on Cotton Shirt — How to Get It Out
Blood stains on a cotton shirt come out cleanly if you act quickly and keep the water cold—hot water will cook the protein and lock the stain into the fibers. Cotton is durable enough to handle enzyme soap, peroxide, and machine washing, but you must treat the stain before it dries. Follow these steps to lift fresh or dried blood without damaging the fabric.
BlueberryCotton
Blueberry Stain on Cotton — How to Get It Out
Blueberry stains on cotton come out reliably if you treat them with cold water and enzyme soap before washing hot. The purple pigment is a tannin stain that sets with heat, so never apply hot water until you've pretreated. Cotton is durable enough to handle vigorous scrubbing and a hot final wash, which makes it one of the easiest fabrics to rescue from blueberry juice.
ChocolateCotton
How to Get Chocolate Out of Cotton
Chocolate stains on cotton respond well to cold water and enzyme treatment because cotton can handle vigorous scrubbing and hot washing once the stain is pretreated. The key is to lift the cocoa butter and sugar without letting heat set the protein and fat before you've broken them down. Cotton's durability means you can be more aggressive than you would with delicate fabrics.
CoffeeCotton
Coffee on cotton — how to get it out
Coffee stains on cotton come out reliably if you rinse them cold first, treat with enzyme soap, and then wash hot. Cotton is tough enough to handle aggressive stain removal, so you can use hot water and scrubbing without worry once the tannins are broken down. Fresh spills lift in minutes; older stains need a soak.