Description: Works on glass and plastic. Spit antifog works on anything that fogs including dive masks, paintball masks, sport goggles, ski goggles, eye wear, windows, binoculars, scopes & more. Apply wet or dry. Spit is so thick that it can even be applied under water! Just one application works all day! Spit is not recommended for swim goggles (use quick spit spray for goggles) SPIT ANTIFOG ...see what you're missing!