Hello,
I have had this tablet for over a year now and it all has been working fine until yesterday when for some reason it started acting like a trackpad(touchpad). To explain this : 

You know how usually a tablet's surface is made to cover the same surface as the screen? Well for some reason now it doesn't so instead in one cm of movement I already get to the top of the screen, it's just like when on a touch pad you'd be moving a few times with your finger to go down.


Does anyone know any way of making it work like it used to again? Only change I made was that I changed the tip of the pen, when it started acting weird (skipping, the tip was worn off). Since then I tried to change it again and even back to the first but the problem persists.