Specialised, concentrated 2-in-1 formula, safe for all glass and plastic lenses — will not harm surrounding silicone or rubber support frames, alcohol-free and non-toxic. Designed for maximum dive mask de-fogging allowing quick and easy in-field application. McNett Gear Aid Sea Drops is also excellent for most glass and plastic lenses on items such as ski goggles, eye glasses, face masks, binoculars and telescopes etc. Not suitable for use on Swimming Goggles, please use McNett Gear Aid Goggle Bright. Convenient 37ml size. DIRECTIONS FOR USE: Clean new mask lenses with Sea Buff™ mask pre-cleaner. This removes the silicone residue leeched from the mask skirt during manufacturing, and enables anti-fogs to work more effectively. Regular cleaning with Sea Buff eliminates dirt, algae, mould and other contaminants that interfere with anti-fog performance. STEP 1: Apply a small amount of Sea Buff to inside and outside of lens. Rub aggressively, rinse and repeat. STEP 2: Buff with a soft, dry cloth until clean, then rinse thoroughly. STEP 3: After cleaning with Sea Buff, apply anti-fog (Sea Gold™, Sea Drops™ or Sea Quick™) to inside of dry lenses. STEP 4: Rub in anti-fog with fingers. Rinse in fresh or saltwater.