Okay, so I was playing a Gamefly rental copy of FEAR 3, and got a message that the disc was unreadable. It was pretty scratched, so I reported the problem & sent it back. I then watched some Netflix, played Arkham Asylum for a few minutes and the popped in Rock Band 3. After nearly an hour of Rock Band, I got another unreadable disc message ( right in the middle of Sister Christian, too...). It had a weird smudge on it that wasn't there when I inserted the disc. Is there a way to clean the lens and/or disc drive? Like a cleaning kit or something (I know the Wii has one )?