I was a bit skeptical at first about the necessity of a dedicated bug & tar remover until I noticed that APC wasn't quite doing the job of removing old bug stains from my front bumper. I have a clear bra on my car, so when bugs are not removed from the surface in a timely manner they can leave etch marks. In an effort to clean up the clear bra and prevent further damage from bugs, I picked up 1Z einszett Anti-Insekt Bug + Tar Remover and I'm really glad that I did! After applying, I let the product dwell on the surface for about 5 minutes and then rinse. About 90% of the bugs come off in this first application, and the more stubborn or older stains can be wiped off with a microfiber towel. It leaves the bumper, windshield, headlights, and side mirrors looking great after a wash. I highly recommend this product!