Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Accept no substitute

If you need to clean any sort of plastic surface, lens, glasses, window or whatever, this is it. This is the only stuff the Air Force will allow the windscreen of a B1 Bomber to be cleaned with, no exceptions. When you have a windshield designed to bounce off a goose at low level mach 1+, its a investment worth protecting.