I bought a 16GB Black iPhone over the weekend and so far it has been great. My only gripe is that this thing smudges so easily. I don't care so much about the back of the phone, but the front constantly has smudges on it and are hard to get rid of. When I do wipe it, it seems to just smear. 1) What do you guys use to clean the smudges? 2) Any way to reduce the smudging?