My wii u game pad has been acting up, I don't really know how to simply describe it beyond saying it's responding to input when no input is being given. The shoulder buttons, touch screen and control sticks are all doing it. Resetting the control sticks to default usually fixes them, but the shoulder buttons and touch screen still do it. I've tried calibrating several times, and it usually works temporarily, but it reverts to the bad behaviour after a short time. Some times I can't even get to the calibration option because the shoulder buttons force me to the very last option and I can't make them stop activating. I've tried resyncing once, didn't do anything.
I've not dropped it, spilled anything on it or as far as I know, done anything to cause this...