We have a Samsung Galaxy S3 from Text Now (SPH-L710). The phone has recently started to emit the water drip sound over and over. When I try to go to access anything, Settings for example, it keeps kicking me back to the home screen. Is my touch screen defective or stuck or something??? I've seen posts about "drips" being the default notification sound, but what about this "backing out" issue???? HELP PLEASE!!!!!!