Ok I'm not a real tech guy but my kids have a 9 month old xbox. A few weeks ago my son's Call of Duty disc quit working so he and his friend decided to rub it down with tooth paste after the machine said the disc was unreadable. Of course given the disc had no scratches it simply destroyed the disc. We replaced it and after maybe 2 weeks of being played, never removed, handled or scratched whatso ever. The xbox slim again is saying the nearly new, perfect condition disc is unreadable. All of their other games play just fine and some of those actually do have scratches. Looking at the disc it is still new and so I can't seem to reconcile what the problem could be. I tried installing the disc on the hard drive which it did after a few tries but the xbox still won't initiate and start the game. I've tried clearing the cache and removing the hard drive with no luck. I'm just at a loss as to what is going on with these Call of Duty discs. Anybody had similar issues?