Removing Tree Sap from a Vinyl Awning

Tree sap only dissolves in alcohol so try soaking the stain with vodka (I'm not sure whether rubbing alcohol would be too strong-but think of that if the vodka doesn't work). Luckily I saw a feature on the TV recently where tree sap was used in a homemade remedy for varicose veins! I hope it works.
Kind regards, Monique

Have you tried using WD-40? It worked on tree sap on my windshield. Good luck!