Deodorant stains are never fun to deal with, but if you can catch them before they dry into your fabric you can remove them with a simple foam packaging brick.

YouTube user Soserious5 was inspired by a commercial product called a Smudge Sponge which is the same exact thing as the free packaging brick except that it's pink and you can buy for $13. Instead utilize the free one and check for stains before heading out; if your clothes are tagged, rubbing the packaging brick into the fabric will remove the stain.

If your deodorant stain is dried into the fabric try aspirin or baking soda.

Cheapskate: How to remove Deodorant from clothes | YouTube