Tree sap: well, soap and warm water don't work, next on the list is methyl hydrate, stronger yet is laquer thinner. Do it in the morning, in the shade, the paint has to be cool. I've never damaged my paint. The trick is do it lightly, and when the sap is gone, car wash soap, rinse and a light buff with detailing spray wax.
And of course, laquer thinner cleans sap off glass too. Oh, don't use a clay bar in this case. That will just smear the sap around. You want to disolve the sap chemically.
And of course, laquer thinner cleans sap off glass too. Oh, don't use a clay bar in this case. That will just smear the sap around. You want to disolve the sap chemically.