How to remove tree sap from cars?

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I need to know how to get tree sap off of my vehicles. I know the best thing to do would not park under these trees or to cut these trees down. Neither of these are an option. The sap comes down in little droplets and sticks like super glue. Other than taking a razor blade or some harsh chemicals, which will both ruin our paint, we are pulling our hair out as how to remove the sap safely.