best way to remove deodorant stains?

White marks on dark clothes? Rub them with a dry nylon sock or another bit of the same fabric, they come straight off. The yellow pit stains on whites are a different problem. Paste of baking soda, hydrogen peroxide and a little dish soap, scrub it in with an old toothbrush, leave it an hour, then wash. Test the peroxide first if it's anything coloured.