I remember going to Sunglass hut to purchase some aviators, and the person helping me out told me only to use the cloth that came with the glasses to clean them... The reason being because any clothing that has gone through the washer (even if dried) contains cleaning chemicals and what not... Well, those glasses had glass for the lenses rather than the plastic found in the 13 dollar pairs, and I wonder, could this be assumed to be the same case with the iPhone 4 as the screen is glass of a type? I'm sorry to go all ocd on what should be just a phone, but I have a thing about keeping my stuff in mint condition, especially stuff that sets me back 200 out of my paycheck. Do you think I should be using the same lens cleaner as the Ray Bans? I was told any clothing and such would cause long term scratching if used as a cloth. Sorry once again, but I fail to understand the difference between microfiber, and whatever clothes are.