It took less than 4 minutes to remove oil and coolant off my engine from a repair. the wheel cleaner kills it. Carful. that fall out one smells like hell ass. But I bet it removes rust and other crud.
Works really great and very fast. With other products I need to make several passes at the inside of the windshield on my cars. With this product one application was all that was needed to get squeaky clean results. Almost makes me look forward to cleaning the back window of my S550 Mustang.

