The description of the product is indeed utter nonsense, because it is not a "permanent wet" cleaner but a dry activated carbon, but this is for the application letzendliche not matter anyway. Remove dust with a brush, clean the lens with felt, cover a few times turn (do not forget!) - It could not be easier. He also cleans reliable, and can of course also not dry out (as a matter of principle already dry as the desert). Top product and the price is absolutely reasonable.