I washed my car yesterday, but could not get the black splash off of both rocker panel behind the front wheels, the rear lower bumper behind the rear wheels, and lower front door corner by the front wheels. I gave up after several mins trying to clean it. I'm not sure if it tar or not, but some people said it should be. Also, there's quite a bit of bug splatter on the front hood, front bumper, and even on the metallic part of the front.
Any recommendation for cleaning?