Question: I know I ask a lot of detailing questions, but this one is killing me. I have tried everything to remove these hard water spots on my windows, and nothing is working. The weird thing is that the front windows don't have them, just the side rear and back. I heard somewhere that the front windows are a different type glass? I don't know, but I do know that it is driving me nuts, I've tried armor all glass cleaner, glass plus (without ammonia), vinegar, clay, and some type of glass cleaner foam, all of which did absolutely nothing on these water spots. I'm wondering if they are actually in the window tint or something but it's factory so I figures other people would notice also. Anyway, any suggestions would be helpful. I also tried rain-X and all it did was seal them in, so I'm out of ideas here. I don't want to use anything abrasive that will scratch them. Thanks