Somebody else had that problem. Let me see if I can find the thread . . .

I didn't find what I was looking for. Some possibly helpful suggestions I did find (other than recalibrating):

E-ink might take a while to "break in."

Make sure you have the shape maker tool turned off.

Are you using a screen protector? If so, slim chance that is causing the problem.

That's all I've got. If you are still having this problem, you might want to start a new thread with the problem in the title.

Best luck to you!!