i suppose we could also argue that not all dishsoap has that shit in it, and there is probably one dish soap that is awesome for washing cars... thatsnot the point.
I'm sure this guys passat is what he wants it to be, and he obviously cares about it enought to claybar it(honestly, how many people on here have ever even claybared there own car?). Until I started detailing, i had never even heard about it. I know that when I washed cars with dawn dish soap, then clay bared and polished them at harolds, they turned out awesome... and every customer was happy.