Review on 💧 Stream2Sea Reef Friendly Mask Defog: Non-Toxic Anti-Fog Formula for Scuba Divers, Ski Goggles, Sports Masks, and Safety Goggles by David Cook

Used on a ski mask for cycling in cold weather. The first time I tried it I tried wiping it with some sort of rag which left streaks and the results weren't very good. I was still woozy, although it may have been scaled down very slightly. But I tried again, and this time I just wiped it down with a microfiber cloth (like you use to clean lenses or screens) and polished it with a piece of soft flannel. The results were insanely good. It stayed fog free for hours even with the goggles literally dripping off how much moisture was on it, even standing still and practically breathing straight into the goggles with all the layers in front of my face. It needs to be reapplied before each use to get the same great results. So it depends on how you use it. But it works really really well!