15" MBP erratic pointer when using trackpad

Just in the last few mins. and seemingly without changing anything my pointer has gotten very erratic while using the trackpad. It will jump around when zeroing in on something to click and even takes a few taps to register. I can even hold my finger in one place on the pad and not move it but yet the pointer will dance around sometimes inches apart. Any idea what could cause this? I've restarted, hard restarted and reset the PRAM. Nothing has helped so far. Thanks.

Nope, always been extremely well taken care of. Has an iSkin keyboard cover.

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