A few days after updating it to 9.1, my IPad(2) just couldn't swipe. It's not frozen and I still get notifications. I can't restart it or anything. I got a new screen since when it was updated the screen was kinda cracked. Before this, my IPad(2) just started opening apps without me touching the screen and taps in certain places like the middle of the screen never te border, though. How do I fix this?