I recently bought a 4th gen iPad from Craigslist. It is great with one exception, the home button is over sensitive. Meaning that it will randomly revert to the home screen or in some case bring up siri because it thinks it is being held down. I am convinced it is a mechanical issue as I have done a reset to factory settings with no positive result. Additionally if I press the screen or bezel in the vicinity of the home button it acts like a button press... It is still under warranty, should I take it to an Apple store? After discovering the problem I also noticed the plastic that is between the bezel and aluminum is kind of nicked up. Could this be indicative of someone already having taken the unit apart, or is that normal for a used iPad? What should I tell/not tell the Apple store? Any help would be great.