How to Remove Sweat / Yellow Armpit Stains from White Shirts
Removal Method
1
Mix 1 part hydrogen peroxide (3%) + 1 part baking soda + 1 part water into a paste.
2
Apply the paste generously to the yellow armpit stains. Work it into the fabric with a soft brush.
3
Let sit for at least 30 minutes. For severe stains, let sit 2-4 hours.
4
Wash in the hottest water safe for the fabric. Check before drying.
💡 Alternative Method
Aspirin method: crush 4 aspirin tablets, dissolve in 1/2 cup warm water. Soak the stained area for 2 hours. The salicylic acid breaks down the aluminum-protein compound causing yellow stains.
🚫 What NOT to Do
- Do not use chlorine bleach on sweat stains (bleach reacts with the proteins in sweat and makes yellow stains worse and more permanent)
- Do not iron over sweat stains (heat sets them)
🔄 If Nothing Works
Oxygen bleach (OxiClean) overnight soak.
Last reviewed: March 20, 2026