MX1000 button stickiness

So I have a new Logitech MX1000 which I generally like, but once in a while the left mouse button sticks when it should be just clicking, and I wind up dragging stuff all over my desktop or screwing with the camera in WoW. Does anyone have any idea what’s going on, or do I need to return it?

Return it.

If you can’t return it, just call logitech. They’ll ship you a new one free of charge and won’t even ask for the old one back. Great customer service.

<insert obligatory sticky substance wanker joke here>