For a while now my Wii has refused to read discs. It says "Unable to read the disc" whenever I put any of my games in. I realize I'm mostly likely going to have to send my Wii in for repair, but one thing bothers me. Sometimes when I put a game in it will magically work, this only happens on the rarest occasions, but happens nonetheless. It seems if my disc drive was broken, no game would ever work. Is there some explanation for why sometimes it will work, even though it usually seems completely broken?