I have uvex stealth anti-fog chemistry goggles, and in lab the lenses build up with dew. It becomes so bad that I can't see and I have to regularly exit the lab every 15 minutes to wipe them off. I sweat when in the lab, so I'm not sure if that's why . There's no fog, just pure dew drop condensation. My professor just recommended buying another pair of goggles and switching back and forth the whole lab, which seems ridiculous to me. Anyone else have this problem? How can I fix this? Thanks!