So our three year old (my cousin) got into a sticky situation today. We've had a gel wrist rest in front of the desktop keyboard for ever, but somehow he or his sister managed to break it yesterday. So this morning (literally five minutes after waking up) he got into it and came back with "webbed hands".

I've managed to get most of it off, but now theres the little residual stickyness on one of his hands. I've used friction, soap, wash cloth, paper towel and ice. Any ideas for getting stubborn goo off of fingers?