Used some other products you would find at your local PepBoys and had horrible results. A few sprays of Nonolex Tar remover and it wipes right off. Worth every cent!
As good as other tar removers are, Nanolex has replaced all the others in my arsenal. It is the most effective tar remover that I have used. Spray, dwell for 2-3 mins and rinse. I rarely need to agitate with this one which I've always needed to do regardless of the cleaner.
The product is awesome
First time out with it, had tar all over behind my wheels that had been on the car over a month (and few a through washes). Sprayed the product on, let it sit for a few minutes, and pressure washed the tar right off. No agitation or scrubbing needed, just took it right off.