Weird Mouse Problem

It's only two years old. In Europe most Logitech products have had a five-year warranty for a long time now; just get it replaced. I think even the latest MX Revolution has something like a three-year warranty, though i'm not sure. I had to get my MX1000 replaced last year; they sent me out a completely new unit in just a few days without even waiting for me to return the old one.

In certain types of mechanical switch a fault develops where if clicked, the switch components rebound a few times (more than they should normally) because some of the parts have become worn. This is an undesirable effect called "bouncing" in electronic terms, and so designers develop circuits specifically to only accept one switch closing operation within a certain time period. This is called a "debounce" circuit.

I have seen this problem in a lot of electronic devices, leading me to believe that most manufacturers rely on the quality of the switch to open and close cleanly rather than on any debounce circuits. With a mouse there is also the chance that the user may simply be clicking the buttons very quickly (eg during a game) in which case a debounce circuit might be more of a hindrance.

Jam it back in, in the dark.