I'm a big fan of pinball apps, and there are really only a couple of them which are very good. I've noticed however, that I can't really enjoy either since the bottom right area of the screen does not respond very well. Sometimes the screen responds, sometimes it doesn't. I've already done a complete restore twice on my iphone 5 so I doubt doing another restore will help. Is this a common issue? Can it be fixed or should I plan on getting a replacement?