I worked through part of college as an automotive detailer at the local Ford dealer and we would use Dawn dishwashing soap when we ran out of bug remover. Tide, joy dawn aplmolive they'll all work the saem, spray it on and let it dry, then wash car and scrub over buggy area and they'll come right off. Note this will strip all wax from the finish, but many times it was quicker to do this and rewax the car than it is to scrub forever. For pine sap you could also use a solvent that they prep cars with before painting, the stuff we had was called Prep-Sol (also strips wax, but works quick and very well), also Orange Cirtus type cleaners should work or a mild degreaser like Simple Green, use a soft bristle brush to scrub stuff off.