You know how you can view your iPhone 5 screen and spread the image to make it larger? My iPhone does that without me touching it! Sometimes when I pick it up, the images are so large I can't unlock my phone. I've tried using my fingers to make it smaller but it doesn't work. I very seldom use the finger spreading feature but the phone does it on its own. Usually it goes back to normal withing a short time but now it's been this way for hours and I need to use my phone. Help please!