I just bought a '94 S10 and the previous owner had taped something to the dash with scotch tape. It looks like the tape has been there for years. It seems like tape has melted and bonded itself to the hard plastic dash. I tried Goo Gone and Stoner's Xenit without any sucess. I've thought about using a putty knife to try to scrape it off as a last resort. Anyone have any experience removing hardened scotch tape?