I am looking for some product(s) that work great on real stubborn tree sap. I have a couple of cars that I might be detailing have some thick sap spots, plus my family hauler has been aquiring sap as well (no thanks to the wifey for parking in her parents driveway for 3 days a week over the past 3 months, even though I told her not too

).
Something thats easy to use, and will eat thru it without some complex process?
T.I.A. Roger