Sweat · Cotton
Sweat Stains on Cotton Shirts — Get Them Out
Sweat stains on cotton shirts respond best to enzyme treatment followed by a baking-soda paste, because the yellowing comes from a mix of body oils, proteins, and aluminum in antiperspirant. Cotton is durable enough to handle scrubbing and peroxide, so you can attack both fresh and set-in underarm stains without worrying about damaging the weave.
- Time45 min
- DifficultyMedium
- MaterialCotton
Watch out
TipTest hydrogen peroxide on an inside seam first if your shirt is brightly colored, though most modern cotton dyes tolerate 3 % peroxide without fading.
WarningNever use hot water in the first steps; heat will cook sweat proteins into the cotton and make yellow stains permanent.
TipCotton can handle vigorous scrubbing, but avoid twisting or wringing the wet fabric hard enough to distort the shirt's shape.
Do this
Dampen and apply enzyme soap
Turn the shirt inside out so you work from the back of the stain. Dampen the underarm area with cold water from the coldest tap setting (under 70 °F), then rub in about 1 tablespoon of enzyme stain soap.
Cold water keeps protein from cooking into the fibers; enzyme soap breaks down body oils and sweat proteins that cause yellowing.
Scrub gently
Use a soft brush or old toothbrush to scrub the stained area in small circles for about one minute. Let the enzyme soap sit for ten minutes so it can work on the oils and proteins.
Make a baking-soda paste
In a small bowl, mix 2 tablespoons of baking soda with 1 tablespoon of hydrogen peroxide to form a thick paste. Spread the paste over the stain while the shirt is still damp from the enzyme treatment.
Hydrogen peroxide brightens yellowed cotton and lifts aluminum residue from antiperspirant without bleaching color out of most dyed shirts.
Let the paste work
Leave the paste on the stain for twenty to thirty minutes. You may see slight bubbling as the peroxide reacts with organic material.
Rinse and check
Rinse the shirt thoroughly under cold running water. If a shadow remains, pour 1/4 cup of white vinegar over the stain, let it sit for five minutes, then rinse again.
Wash normally
Launder the shirt in the washing machine on the warmest setting the care label allows, using your regular detergent. Check that the stain is gone before you tumble-dry, because heat will set any remaining residue.
Common questions
What if the sweat stain is old and already yellow?+
Soak the shirt in cold water with 1/4 cup of white vinegar for thirty minutes before you start the enzyme treatment. Old stains may need two rounds of the baking-soda paste. If yellowing persists after the first wash, repeat the peroxide paste step and launder again.
Can I skip the enzyme soap and just use baking soda?+
You can, but enzyme soap breaks down the body oils and proteins that cause the stain, while baking soda mainly lifts surface residue and deodorizes. Using both gives better results on set-in underarm stains.
Will this method work on colored cotton shirts?+
Yes, hydrogen peroxide at 3 % is gentle enough for most colored cotton. Test on an inside seam or hem first to be sure. If you see any color lift during the test, skip the peroxide and use only enzyme soap, baking soda mixed with water, and vinegar.
How do I prevent yellow sweat stains in the first place?+
Switch to an aluminum-free deodorant, because aluminum compounds in antiperspirant react with sweat to create yellow stains. Let deodorant dry completely before you dress, and wash shirts promptly after wearing them so sweat doesn't sit in the fabric.
Same stain, other materials
SweatCotton
Sweat Stains on Cotton — How to Get Them Out
Sweat stains on cotton respond well to enzyme soap and baking soda, which break down the proteins and oils that cause yellowing. Cotton is durable enough to handle scrubbing and hot water, so you can treat both fresh and set-in stains aggressively. The key is to work on the stain before it oxidizes and turns yellow, but even old underarm stains can be lifted with the right combination of products.
SweatLinen
Sweat Stains on Linen — How to Get Them Out
Sweat stains on linen respond well to enzyme soap and baking soda because linen is sturdy enough to handle scrubbing and soaking without damage. Fresh sweat lifts easily, but yellowed underarm stains need a soak to break down the oils and salts. Linen dries fast, so you can treat and rewash the same day.
SweatMattress
Sweat Stains on a Mattress — How to Get Them Out
Sweat stains on a mattress respond well to a paste of baking soda, hydrogen peroxide, and dish soap, which lifts the discoloration and neutralizes odor without soaking the foam or springs. Because you can't throw a mattress in the washer, you'll work on the surface and let it air-dry completely before making the bed again.
SweatPolyester
Sweat Stains on Polyester — How to Get Them Out
Sweat stains on polyester respond well to enzyme soap and baking soda because polyester traps body oils and deodorant residue that turn yellow over time. Unlike natural fibers, polyester won't shrink or felt, so you can scrub and soak more aggressively. The key is breaking down the protein and oil buildup before washing.
SweatPolyester
Sweat Stains on Polyester — How to Get Them Out
Sweat stains on polyester shirts respond well to enzyme soap and white vinegar because polyester holds onto body oils and deodorant residue that trap odor and discoloration. Unlike natural fibers, polyester won't shrink or felt, so you can scrub more confidently—but it does need cooler water to prevent setting the stain permanently.
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.