MS: DIY Underarm Stain Remover: 1 part Dawn (or any dishwashing liquid, I assume), 2 parts hydrogen peroxide, then add baking soda to create a paste. Use brush to work it in, and let it sit for 1 hour.
7 Tips to get rid of sweat stains from armpit, collar and cuffs
How to rid and prevent underarm stains. Crush 8 – 10 Aspirin pills in a small bowl. Add just enough water to make a paste. Work the paste into the stain. Let it sit on the stain overnight. Wash as you regularly do.
How To Remove Yellow Armpit Stains. If you suffer from hyperhidrosis (excessive sweating) in your underarms, you can also try miraDry is a solution that offers a permanent reduction in the amount of underarm sweat.
Goodbye to Yellow Armpit Stains: one part Dawn dishwashing liquid + two parts hydrogen peroxide + some baking soda. Use a small laundry brush to work the mixture into the stain for a few minutes. Let sit for an hour or so then launder as usual.