Saturate set-in stains with vinegar, then rub the spot with a paste made from equal parts vinegar and baking soda. You can add a couple of tablespoons each of vinegar and laundry detergent to a bucket of water and soak the garment overnight ?if the stain persists. Then, rinse and wash.
Keeping this in view, does vinegar get yellow out of clothes?
Distilled White Vinegar
White vinegar is key to removing yellow underarm perspiration stains and odor, removing mildew stains, whitening and brightening your clothes. Just adding one cup of distilled white vinegar to the final rinse will leave clothes feeling soft and smelling fresh.