So my iPhone 5 screen is sporadically acting goofy. It'll randomly go into periods of unresponsiveness, where it has difficulty smoothly tracking my finger and swipes, and won't react to flicks. I reset the phone to no avail, but resetting the settings fixed the problem. However, it just happened again. It seems as though it's losing calibration. It's quite annoying, and I have no idea how to prevent it from happening. Suggestions?