Donâ€™t let the crazy name make your hair stand up. Award winning Cat Crap Anti-fog Lens Cleaner by EK USA is simply the best lens cleaner available for sunglasses, binoculars, and other optical glass products. Cat Crap is simple to use, just rub on and rub off and you will stay fog-free and happy all day. Comes in a compact container that is easy to carry in your pack or vest. Keep the fog at bay with Cat Crap lens cleaner.