Is there such a thing as touchscreen calibration
As you asked for a calibration tool: The Playstore seems to have some suitable candidates, e.g. Touch sensitivity calibration. But while this might be helpful, the permissions look quite suspect: The only job of the app is screen calibration, but it requests permissions such as accessing your contacts, call phone numbers, read and send SMS/MMS, and more -- according to a screenshot on the apps page at Google Play. Funnily, the permissions tab says differently: No permissions required... So I'd give it a try, and abort installation in case those permissions really turn up.