Joey put a big lump of sap in my hair once. Since we were camping and I had no Goo-Gone with us, I ended up cutting a big chunk out of my hair (my bangs extended about 2 inches farther back my head on one side

).
Goo-Gone may be icky, but it works like a charm on sap in hair, lemme tell ya. I've not been without it since that camping trip, and it's come in handy a number of times.