Spread Murphy Oil Soap with a mop directly on the sap. Wait 15 minutes and scrub with the grain of the wood. Rinse until gone.
thank-you I will try this I need to remove pine tar so I can put out door carpet on deck.
A power washer should work. We used one on our deck and it worked great to remove green algae etc. Check out https://karupp-did.net/power-washer/ to see before and after pictures.
I don't think it would work the pine tar is hard as rock can't scrape it off thanks for your answer
Try a pressure washer and some soap