I see a lot of threads about the best mice and recommendations, now let's hear about your worst mice experiences.

I haven't been in the game very long, so I can't really say I have had many... started out with a Logitech M510 that I found on sale at BestBuy, followed by a Logitech G400 and a Razer Deathadder (bought on a whim while it was on sale as a backup in case the G400 decides to crap out).