Michael in FtW said:Call me crazy - but this works to get rid of the sticky label gum ... a paper towel and a dab of mayonaise .. something about the oil I guess. It doesn't contain any chemicals that can harm plastics or paints. It takes a little rubbing but is safe.
I've also been told that peanut butter will also work, but I've never tried it. And, before Buckytom or Goodweed can ask the obvious question ... it appears that smooth and chunky work equally well, but creamy is less abrasive.