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.
A pinner states: this is THE BEST laundry stain remover! You have to try it -- I discovered it completely by accident. It removes blood, grease/oil, grass, food, ring-around-collar & pit stains! Just rub it into spot & launder as usual!