Quote:
Originally Posted by
jacson 
I work in construction and I need a question answered about stains that develop in the underarm of my tee-shirts. The stains are very dark and make the cotton of the tee-shirt stiff and rigid.
hey jacson, i'm no expert here, but from what i have seen and read, when the chemicals in some antiperspirants come in contact with sweat and transfer to the underarm area of your shirt, they manifest themselves in mostly three ways:
1. yellow/brownish stains
2. discoloration, plus stiffness
3. waxy build-up (mostly from stick antiperspirants)
+ odor on all three
the easiest ways to avoid that from happening is to
1. switch from antiperspirant to deodorant. not good for preventing underarm sweating though.
2. tryout different antiperspirants (like the ones listed here in this thread)
3. let your antiperspirant fully dry before you put on your clothes. i do this by putting my roll-on antiperspirant on right after I get out of the shower. then it's totally dry by the time i'm putting on my clothes.
4. continue using the same antiperspirant and use a product like deo-go or pit stop to remove it. those products are designed to dissolve the stains.
hope the above information helps you out!
best,
tug
undershirtguy.com