Goof Off, which is sold at hardware and even grocery stores, is nothing but Xylene in a can.
Xylene is a great solvent for sticky, gooey stuff. I always like to keep a can of Goof Off around. But, it's a powerfull solvent and you have to be very careful with it around delicate materials, wood, etc.
WD-40 is the solvent I always start with because it's so gentle.