was wondering do you guys trust that windshield wash? how can you be sure of the % of water and other chemicals in that blue stuff unless its listed. i know you can get the alcohol at 99% and 70% but do you really know whats going in those blue jugs. i know its cheap but i would be worried that a little extra water or other crap in those jugs would make me worried. also isint there ammonia in windshield cleaner? i know ammonia is used in cleaning copper out of a barrel but is kinda harsh and you have to get it all out cause it eats metal over time. just curious?