I'm fairly sure that this is a mechanical problem that will require a new mouse, but I thought I'd ask anyway.

My mouse, (Microsoft Optical Wireless), has developed a problem where it intermittently double-clicks when I only click once. This causes quite a few problems, especially when trying to do on-line banking. The mouse is about 3 years old.

Anything I should try before I chuck this one in the bin?

Thanks;
Dex