don't have a roof rack, open the doors and loop the rope through the car to tie it down. if you just run it through the windows, you won't be able to open the doors to get into your car.
if sap gets on your car, use rubbing alcohol to clean it off. put some on a washcloth, lay it down where the sap is, leave it there for 30 seconds, and it should wipe right off.
read more at safe bee. 