Originally Posted By: Rock_Hudstone
Isopropyl alcohol, about .99 cents at Walmart last time I checked, with inflation probably $1.19 now.
This is the only appropriate answer here.
If sap is dry and baked on, your best bet is to carefully pick away as much of the dried sap off as you safely can and then soak the spot in Isopropyl alcohol until it's soft enough to wipe away. Dried sap is a real PITA to remove.