I have been trying to clean the inside of windshields for years, but nothing works. No matter what I use, there is always still streaking and/or some kind of film left on the inside of the windshield. The awkward angle of the windshield makes wiping difficult, but I think there's more to it than that. Though I can't prove this, I suspect there is some kind of chemical reaction created by the sun beating down on the dash causing some form of gas that leaves a film on the inside of the windshield that may be impossible to completely remove. I have tried just about every type of glass cleaner and home remedy ever devised, but nothing works. Have any of you found anything that gets the inside of the windshield absolutely clean?