Cat Crap Anti-Fog Lens Cleaner is the best! The mild ingredients are safe on all lenses and coatings, including anti-reflective coatings. Simply apply with a soft cloth and wipe off. It comes off leaving a clear film that prevents fogging, cleans the lens and even fills the small scratches. Cat Crap is safe for hundreds of applications and available in the convenient 0.25 oz tub with a flip top lid. Use it as often as you like for clear smudge and fog free vision. Great for Sunglasses, ski goggles, hunting scopes, safety glass lenses, sport eyewear, and regular glasses. This crap works!