I just picked up an iPad mini 4 last week and got it all set up and played with it for a couple of days. Then I started to notice that there's one spot on the screen that slightly creaks when pressure is applied. I'm normally not the kind of person who listens to every little sound a device makes to believe something is wrong with it so it was noticeable. I brought it in to the Apple Store today and had one of the Genius guys check it out and he couldn't identify it but wasn't worried although he did say that if it really bothers me I could return it and get a new one. Just the thought of having to wipe out my iPad and go to the store to get a new one is a bit of a chore but I was wondering what everyone here thought. Does this sound like normal usage or should I exchange the unit?