Ok, I discovered this by accident one day, and I've been using it for resin and adhesive residues ever since. (No, not THAT kind of resin)
I had peeled a label off a bottle and it left that slimy-sticky residue that soap only smears around. Ugh. I was out of rubbing alcohol, but I was determined to get this stuff off! I rubbed it with some oil hoping that would help dissolve it a bit, or make it less sticky, like with gum. Hmm. Nope. Then I remembered that I had a bottle of that ear-drying liquid for swimmers, which is basically rubbing alcohol and glycerin. I rubbed that over the sticky residue, let it sit for a minute, wiped with a cotton ball, and... it worked! All that slimy sticky stuff was coming right off!
Ok, so I went to do the next bottle, using just the alcohol-glycerin stuff. Results were not as good. Huh? Oh! The oil! I rubbed some oil on, and THEN tried the alcohol-glycerin. Perfect!
Olive, coconut, grapeseed, any kind really, except mineral or petroleum stuff.
So then I tried all sorts of sticky stuff. Different kinds of adhesives. Including the 'skin-tac' stuff that keeps one of my patches in place for the required 3 days. It's made with resin to give it the stickiness. Very sticky. Used to take me several washings to get the residue off. Now it comes right off.
Works on tree sap also. Rub in some oil, add the alcohol-glycerin mix, let sit a minute but not long enough for the alcohol to evaporate, then wipe with a cotton ball -- using a clean spot for each swipe.