Remember, the Wii controllers work on IR.
I'd strongly reccomend putting the sensor on top of the TV if that's possible.
AND IT NEEDS TO BE CENTERED ON TOP OF OR ON THE BOTTOM OF THE TV, IT CAN NOT BE TO THE LEFT OR RIGHT
You will need to do two things (if you haven't already)
1.) Remove ALL strong/extraneous light sources that could be interfering with the sensor on the controller. (Bright, luminescent lamps in the vicinity of/behind/in front of the TV) You don't have to turn the lamps completely off, just move them away from the TV area.
2.) Go to the Wii settings and run the controller sensitivity setup, it'll have a screen with dots and descriptions of how many dots it should have at the correct sensitivity (I can't remember off the top of my head).
those things should help with the sensitivity and jitter of the Wiimotes.
They're not very good in general even when they're funcitioning perfectly (there's always a SLIGHT jitter, but it should be passable).
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