In order to maintain your skin clean during sweaty workouts You have to constantly focus on keeping every drop of sweat off your face. Most athletes with acne problems keep cotton pads with them during workouts to wipe their faces every chance they get, but personally I find that keeping a mist spray bottle full of clean pure water (you can even dilute a bit of tea tree oil - or whatever toner works best on your skin - for extra help with sebumproduction). Just mist your face real good and then use a CLEAN soft wash cloth to wipe everything off . This helps me a lot whenever I go for long jogs.