4 body odor hacks I swear by as a dermatologist. If you have bad body odor, here are a few things you can try to smell good all day long: 1. Use PanOxyl 4% (benzoyl peroxide) cleanser in the shower 2-3x/week. PanOxyl can help reduce odor causing bacteria on the skin. Lather on areas prone to odor, leave on for 1-2 minutes, and then rinse off (can stain towels and sheets). 2. Instead of using glycolic acid, try lactic acid 5% 2x per week on your armpits. Pour on a cotton pad and then gently pat i