L.G.
Oil dissolves adhesives: it's good for getting it off of jars (when you pull the label off and the sticky stuff remains), clothing, etc. I've used olive oil, spray oil, mayonnaise, peanutbutter, anything with a high oil content will do, but I like the spray oil (like PAM) best. Apply, let sit for a bit to soften and loosen, then toss in the wash.
Best of luck!