Deodorant stains.

Notice a white buildup under shirt arms?  Reader’s Digest offers a few tricks to remove antiperspirant residue on cotton and poly-blend garments. An hour soak in white vinegar can loosen stains and odors. Lightly scrub the stained areas, then launder as usual. A baking soda paste, left in place from 20 minutes to overnight, helps lift stubborn stains too.  Stains embed with time, so the sooner you treat and wash, the better your chances. As always, for best results, let us expertly launder your shirts.