Criminy, I wish they made the Mighty Mouse easy to open, given how easily it gets gummed up. The instructions I've found on the web are absurdly complicated for what ought to be a trivial process of cleaning out the gunk, as one had to do often enough with the old time trackball mice. I'm on my third one since November, and in each case, the track ball stopped working, and no amount of cleaning, rolling, jiggling, banging, etc. would get them started again. The Apple store replaced them under warranty, but nevertheless it's awfully tiresome. As long as they keep replacing 'em, I'll keep taking 'em back. They'd save themselves a lot of money if they came up with a design that didn't require replacing the whole darn thing every two months. I just had a scare with the latest one when it stopped scrolling up. A damp microfiber cloth did the trick, but we'll see how long that lasts.