Since a couple of days I notice that my touchscreen is reacting a little strange.
Sometimes when I touch the screen a different part of the screen reacts.
Lets say I want to touch the upper right of my screen , one button on the right reacts

But then after a few seconds everything is working normal.
To see what the problem could be I made my mouse pointer visible and notice that the problem appears when Ik touch the screen gently.
When I press harder then eveything works OK.
I already re installed drivers , but problem is still there.
Screen is stripped down to be attached to a homemade bezel. Now I wonder if the problem could be that the touchscreen is reacting on this. (touching the borders of the bezel

)
Anybody who also had this problem??
Calibration has already been done several times, but this didn't solve anything.