Screen Condition Issues

Recently, I have had issues with my Nexus 4's screen, and it's really been bugging me. It seems to be scratched quite a bit now (I don't know why, it has always been kept in a separate pocket from my keys) and feels a bit sticky, even immediately after cleaning it. This makes using it feel horrible and I often resort to not using it at all. Now that I have a new Nexus 7, I can directly compare the feeling of the screens, and the 7's is far better (because of its new condition, of course). Does anyone know what I can do to make the screen feel better?