Calibrate before use, and, if it's hard to drag and you find yourself pushing it to get results, go get it fixed.

It's exactly as sensitive as I can drag my finger over it just softly enough to feel my finger touching and not trigger a click. Anything over that, it registers. This is exactly as I want, be able to softly, very softly, drag my finger to the touch point. This helps me track parallel to the screen, as lifting isn't as precise.

As for screen protectors, you unearthed the wrong thread.