Wii U GamePad "parabolic" touchscreen malfunction.

I think the picture explains itself. I used a ruler and made these lines with the stylus, from top to bottom.
Idk how to best describe the issue, this misinput? Tried cleaning out the dust with a toothbrush, recalibrating - didn't help.
I guess I never noticed this when I used to play it, but when I wanted to draw something - it really became noticible, because the whole right part of screen is malfunctioning!
The LEFT part of the screen works and outputs correctly!