So I was cleaning my iPad today and took it out if it's case. It's like a jelly skin so it wraps around the thing. Anyway as I was cleaning it I noticed that when I was wiping the glass there was a squeaking noise coming from the top part of the pad so I pressed a little harder and then heard a click as if the glass came out when taking out of the skin and then popping back in. Is this normal or should I be taking it back in to apple for them to look at?