Yup, better unplug it just in case. I had a TrackIR4 set and i didn't know about this, it died on me within just two years.
I really liked how precise and useful it was, but the flimsy construction of the track clip pro (it broke within the first two months and i'm one of those extra careful people with my equipment, keeping non-upgradeable peripherals like joysticks and speakers in good condition for 10 years or so on average) and the fact that the camera is so sensitive has made me wary of making the investment for a new set.
I now use trackclip pro (held in place with duct tape) and an ordinary webcam with freetrack. It's not as smooth and precise but it still does the job fine.
If there was an extended warranty policy i might pick up a trackIR5 in the future as it still is better in precision overall, but right now i'm not very keen on spending the money.
Long story short, take care of your trackIR cameras and unplug them when not in use, because if they get damaged you will really miss its functionality
