I am a long time reader (lurker) on the board but really have had nothing to contribute to this point. Now that I have my new rig I have a question. There are some spots on the tinted side windows from hard water that dried on them. I have tried to work them off using various chemicals but was curious if anyone has figured out the secret of getting rid of them. I am thinking you need some kind of rubbing compound and a buffer to get after them but I thought I would ask the Pro's. I Look forward to being able to not only continue reading but contribute if I can in the future. This is a great site and it has been a tremendous resource for me as I educate myself on this complex machine.