Not that I don't love the smell of xylene in the morning, but here is a hydrocarbon and caricinogen free way to clean up sticky residue that is not linked to liver cancer:
From a column called "Hints from Heloise"- one of those handy little columns that had like 101 uses for coffee grounds and used tea bags
But this does work:
Cooking oil will remove masking tape and "sticker" residue from furniture, glass, etc. (like when you buy a new picture frame and the sticker is right in the middle of the glass) Don't know why it works, but it definitely dissolves the stickum - and then you follow up with a little windex or orange clean to remove the oily residue. If you want 3M to get into the act, a Scotch-Brite pad or 000 steel wool helps expedite the process.