I have a shower with two sides that are glass. The glass has spots on it that look like water spots. I have tried EVERYTHING to remove them (Soap scum removers, Lime Away, CLR, Razor, Mineral Spirits, Vinegar, daily shower sprays, Windex) Nothing works - no change at all with any of the above products. If anyone has any ideas on other things to try - please tell me! I am going to try a few more things and then rip the whole thing out. The shower is almost 4 years old. Could something have happened to damage the glass permanently? I am completely frustrated.