Well, depending on where you put it, there can be plenty of dust. I know in my finished basement, i left my copy of GTR2 out for maybe 1 week and it was covered with a nice coat of dust. Not to mention, the more you play, the more air sucked in, and the more dust sucked in. It could also be a defect. Perhaps the fan(s) aren't seated properly in the console, or there is a defect in the fan itself.