How to whiten yellow shirt stains: Mix together 1 tbsp Dawn dish washing liquid, 2 tbsp hydrogen peroxide, and 2 tsp baking soda. Apply the mixture to the yellow area and scrub gently. Leave sit for two hours and launder as usual.
#StyleHack: How to Remove Yellow Armpit Stains for Good
How To Remove Body Oils Stains and Odors from Bed Sheets--laundry detergent, 3 squirts of dishwashing soap, cup borax, hot water wash--soak before washing for 30 mins-then wash cycle. Use cup vinegar in fabric softener dispenser.