I never had such a problem, but I did notice how natural IR light can make it go nuts. (It seems to use the wii sensor bar to calibrate itself when it catches it, and if you have you TV near a window with sunlight coming in, you're very likely to have a ton of natural IR light confusing it, which could be causing such a problem... perhaps. Had me stumped for a bit thinking the motion plus was going nuts until I tried closing my curtains lol.