We all are fans of that perfect white shirt, however nobody is a fan of stains especially under our arms! Don't throw another shirt away, read on. We did some research and found the top solutions to remove those yellow underarm stains that we don't like to talk about.
To treat existing armpit stains, make a paste of baking soda and water. Apply the paste to the stains, let it sit for several hours, and wash as usual.
Don't put stained shirts in the dryer as the heat will set the stain.
Lemon juice and sunshine make a natural perspiration stain remover. Apply the lemon juice to the stained area and lay the garment in the sun to dry before washing it as usual.
Crush sufficient aspirin to make, when mixed with enough water, an adequate amount of paste to cover all the areas of yellowing, let sit overnight, then wash. You may repeat this treatment until the stain comes out, and you may gently rub the stain with a soft toothbrush being careful not to damage the fabric.
Using one of three Rit products may rescue garments that have aged or have been turned yellow through over-bleaching. RIT Color Remover can remove yellow bleach stains from normal fabric, Rit Color Brightener handles yellow age stains, while Rit White Wash gets out the yellow from fabrics that have finishes that cannot be bleached.
Darker colors may have stiffness or residue on the fabric under the arms. To remove the build-up and freshen the garments, fill the washing machine with cool water and add one cup of white vinegar. Allow shirts to soak for at least 30 minutes. Drain vinegar water and wash as usual in cool water.