My pen tablet doesn't work properly (it presses by itself)

when i try using the pen, it auto-clicks without me even pressing the tip of the pen on the tablet, i suspect it being some sort of crust inside it but i don't know how to get it out. i don't know what to do and i don't want to spend hundreds of money at the local tech-fix store.
I had this tablet for a couple of years, i forgot what type of wacom tablet it was. my pc is a windows 11 though!