We recommend cleaning the goggles only by rinsing with fresh water and left to dry. Additionally, using filtered water to rinse helps avoid water spots. We advise against trying to clean it by using even a soft cloth (as you would with a pair of sunglasses) as the cloth would be considered an abrasive and could scratch the lenses. It would also have a tendency to remove the thin layer of anti-fogging agent inside the lenses or cause the inside of the lenses to develop a film that is not removable. Avoid any damages to the inside of the lens for preserving the anti-fog treatment. Do not spit on or rub the lens with your fingers. Avoid solvents, detergents, alcohol, fog proof liquids different from recommended ones. Keep the product away from heat sources and avoid direct exposure to sunlight.