Slather on that anti-perspirant before bedtime. You read that right. Take a shower before bedtime (or just spot-wash your underarms or your smelly feet). Dry it off and apply the anti-perspirant. Why at night? Your body's temperature naturally lowers and you're less likely to sweat. This gives the anti-perspirant a chance to fully absorb and allows its active ingredients to go to work. So the next day, by the time you step in the shower, you'll be protected. Make it your nightly ritual, just like using your facial or acne products.