On Thu, 09 May 2013 17:32:01 +0000, Danny D wrote:

UPDATE:

Nothing really worked better than dish detergent and water
for getting the *paper* part of the labels off the plastic
Costco vitamin jars... but the gummy glue residue was left:
http://www3.picturepush.com/photo/a/...g/12899721.jpg

MAF cleaner dried too quickly, leaving a sticky residue:
http://www3.picturepush.com/photo/a/...g/12899731.jpg

Brake cleaner had similar results to the MAF cleaner:
http://www2.picturepush.com/photo/a/...g/12899695.jpg

My wife noticed the smell with the engine degreaser:
http://www1.picturepush.com/photo/a/...g/12899744.jpg

The alcohol was ineffective at reducing the gummy glue:
http://www2.picturepush.com/photo/a/...g/12899750.jpg

The paint thinner turned the glue into a milky residue:
http://www3.picturepush.com/photo/a/...g/12899756.jpg

Likewise with the better-smelling WD-40:
http://www1.picturepush.com/photo/a/...g/12899764.jpg

Acetone simply made the plastic itself sticky:
http://www1.picturepush.com/photo/a/...g/12899769.jpg

And TSP didn't do much more than the dish detergent did:
http://www2.picturepush.com/photo/a/...g/12899780.jpg

Within margins of error, I'd have to tentatively conclude that
the winner would be whatever smells best to you of these 3:
http://www1.picturepush.com/photo/a/...g/12899794.jpg

For example, here's a before-and-after glue-removal comparison:
http://www2.picturepush.com/photo/a/...g/12899805.jpg