How do you prevent them? Most all of my white shirts are ruined when I have had them but a month!! I always put deoderant on in the morning and even bring it to school because I have to keep putting it on. Sometimes around 5 times a day! It seems ridiculous and I was wondering what kind really works. Or what would get sweat stains out of your clothes because Ive tried tons of stain removers and bleach. Nothing works.