that had a sticker that said, "No user serviceable parts inside"?
Replace it.
My mouse has been freezing up repetitively today and it finally stopped working. If I wait a while (a couple hours?) it'll move a very little amount then stop working again. I have another mouse (which I'm using) which works perfectly fine. (I just hate it because of it's twitchiness
) The broken mouse is optical (and not wireless) Any way to fix this or is my only option to get a new mouse?

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic