Conventional lens cleaning fluids may be used to clean the lenses. If the foam becomes wet or damp after use, do not put the goggles in the case until dry. In common with all ski goggles on the market, wet foam can cause the lenses to fog more easily. If you place your goggles on the helmet, make sure the helmet is as dry as possible to prevent the foam from getting wet, which can cause the lenses to fog.