I have removed the old laminate countertop, backsplash, and sink/faucet, but there is old adhesive left behind that I must remove before my new countertop arrives for installation. That stuff is hard as nails! (Heck, it might be Liquid Nails...) Anyway, how the heck does one remove this stuff? I've already broken two razor blades, and a putty knife is about useless on it. Any suggestions? Chemicals? Dynamite? Nuclear device?