Sea Buff Dive Mask and Dive Slate Cleaner and Precleaner Scuba Diving Diver G... Dive mask pre-cleaner and slate cleaner Removes residue left on new dive mask lenses by the manufacturing process, without scratching Prepares lens surface for application of Sea Gold anti-fog formula Removes dirt, sunscreens, lotions, sunscreen, body oils, algae and other debris Cleans dive slates without discoloration or scratching