I have a Logitech MX518 wired mouse. It works fine, but as of yesterday has developed an odd glitch in that when left unused for around 20 minutes or more, whether the computer is on or off when I next press the left button it has a more solid feel to it along with a loud click, after pressing it a few times it reverts to the normal soft silent click. I haven't moved the computer or loosened the USB connection, haven't done anything to affect it at all outside of normal usage.
Has anyone come across this before, or got any ideas what could have caused it?


