Me being the usual paranoid person I am, I'm worried that I might be doing damage to my 27" iMac that I've had for a few months after reading a thread over in the iPhone forum. In the thread for the iPhone someone was using windex to clean his iPhone and he was being warned about rubbing off some kind of coating. I use the little bottle of eyeglass cleaner that came with my eyeglasses and a microfiber clothing thinking that if it's not supposed to scratch my glasses it won't scratch the screen either. I'm gonna switch over to warm water from here on out, but did I do any damage thus far? I don't believe the iMac glass has any kind of coating but I may be mistaken.