i use glass cleaner and have had good success. If there is a film afterwards, I wipe again until it's gone. Usually the second time will get any leftovers. They make cleaner products specifically for our hobby, but if you ask me, it's probably just a gimmick to get your $$. I'd rather spend my money on another gallon of fuel (so we can get all dirty again) and a one dollar bottle of glass cleaner from Dollar General.