Hi guys, This is my 3rd day using my iPhone 4, I haven't dropped it or done anything unusual. I have babied this thing, but I was just cleaning it and noticed this on the back of my iPhone. What caused this? It's new and I don't want any physical defects that I didn't cause so if it allows me a reason for exchange I would like to know. Thanks. You can see a condensation type of thing under the Apple sign and such. I can try to take better photos.