sap from pine trees

[aquabones]

does anyone know how to remove sap on a deck left from pine tress.
I tried Murphy's oil soap, Lestoil, and Goo gone-no luck. Then I tried hosing it with hot water-didn't work. I'm reluctant to get a power washer since that might tear the wood apart. My next step will be to scrap with an oscillating scraper-which will probably take the paint off.
If you have any easier ideas, please let me know.