Mildew · Upholstery
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.
- Time45 min
- DifficultyMedium
- MaterialUpholstery
Watch out
WarningSilk, velvet, and rayon upholstery can water-spot or shrink. Test the vinegar solution on a hidden seam and blot immediately if the color bleeds.
TipIf the cushion foam itself smells musty, the mildew may be deep inside. You may need to remove the cover and treat or replace the foam.
TipNever use bleach on upholstery unless the care tag explicitly allows it. Bleach can discolor or weaken most furniture fabrics.
Do this
Vacuum the mildew
Vacuum the stained area thoroughly with an upholstery attachment to remove loose mildew spores and surface debris. Work outdoors or near an open window if possible to avoid spreading spores indoors.
If the mildew is powdery and dry, a stiff brush outdoors can knock off the worst before you vacuum.
Spray with vinegar solution
Mix 1 cup white vinegar with 1 cup water in a spray bottle. Spray the stained area until damp but not soaked — upholstery foam and padding hold water and can mildew again if you drench them.
Scrub gently
Use a soft brush or old toothbrush to work the vinegar solution into the fabric in small circles. Let it sit for 10 minutes so the vinegar can kill the mildew.
Blot and apply baking soda
Blot the area with a clean white cloth to lift moisture and loosened mildew. Sprinkle 2 tablespoons of baking soda over the damp stain and let it sit for 15 minutes to absorb odor and remaining moisture.
Vacuum and dry completely
Vacuum up the baking soda. Place a fan near the upholstery or open windows to speed drying — the fabric must be bone-dry within a few hours or mildew can return.
Common questions
What if the mildew stain is old and set in?+
Repeat the vinegar spray and scrub step two or three times, letting the solution sit for 10 minutes each time. For stubborn stains, try 1 tablespoon hydrogen peroxide 3 % mixed with 1 cup water, tested first on a hidden spot. Blot well and dry completely between treatments.
Can I use this method on leather or faux-leather upholstery?+
No. Leather and faux leather need different care. Wipe mildew off leather with a damp cloth, then use a leather cleaner or saddle soap. Faux leather can crack if you scrub it or soak it with vinegar.
How do I keep mildew from coming back?+
Keep the room dry and well-ventilated. Use a dehumidifier if the space is damp, and don't let wet towels or clothes sit on upholstered furniture. Sunlight and air circulation are your best prevention.
Is the vinegar smell permanent?+
No. The vinegar smell fades as the fabric dries, usually within a few hours. Open windows or run a fan to speed it up. If a faint odor lingers, sprinkle baking soda again, let it sit overnight, and vacuum in the morning.
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.
MildewCotton
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.
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.
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 upholstery
BloodUpholstery
Blood on Upholstery — How to Get It Out
Blood stains on upholstery need cold water and enzyme treatment to break down the protein before it sets permanently. The key is to work quickly, blot rather than rub, and never use hot water, which will cook the protein into the fibers. Upholstery can't go in the washing machine, so you'll treat the stain in place with careful blotting and rinsing.
BloodUpholstery
Blood on Upholstery — How to Get It Out
Blood stains on upholstery need cold water and enzyme treatment to break down the proteins without setting the stain or soaking the cushion foam underneath. Upholstery can't be thrown in the washing machine, so you'll work on the surface with minimal water and careful blotting. Speed matters: fresh blood lifts far more easily than dried.
BlueberryUpholstery
Blueberry Stain on Upholstery — How to Get It Out
Blueberry stains on upholstery come out best when you work from the outside in with cold water and a mild detergent, avoiding the temptation to scrub hard and spread the purple dye deeper into the cushion foam. Fresh stains lift in minutes; set stains need patience and repeated blotting. Always test your cleaning solution on a hidden seam or back panel before you treat the visible stain.
BlueberryUpholstery
Blueberry Stain on Upholstery — How to Get It Out
Blueberry stains on upholstery need cold water and quick action to prevent the purple pigment from setting into the cushion foam and fabric. Because you can't soak or machine-wash a sofa, you must work carefully to avoid spreading the stain or soaking the padding underneath. The key is to lift the stain from the surface without pushing it deeper into the cushion.
ChocolateUpholstery
Chocolate on Upholstery — How to Get It Out
Chocolate stains on upholstery come out best when you scrape off the solid residue, treat the grease and protein with enzyme soap, and blot carefully without soaking the cushion foam. Chocolate combines fat, milk protein, and cocoa tannins, so you need cold water to avoid setting the protein and a degreaser to lift the oils. Work from the outside in to keep the stain from spreading across the fabric.