the tablet surface should be smooth to begin with. either your tablet/nib is extremely dirty and getting caught on something or your nib is really sharp and actually somehow digging into the tablet surface (i guess your tablet surface could also just be really weak for some reason). but all of those cases should be true. in general, when you drag you aren't pressing down like your trying to write a 45 page essay in a 1 hour test period. i mean some people probably do that, but i assume most people more or less just let it rest on the surface. had my tablet for years and it's smooth as ever, but the clicks are a little glitchy now.