That is true, which is why you dont use dish soap every time, I only use it when I clay bar and wax, And I only do that about every 3 months. Its best to use dish soap before you clay bar, so I just set up my routine to every 3 months wash with dish soap, clay bar, then wax. and in between just do regular washes until I decide to clay and wax again. Im very particular about how I clean my car lol. It usually ends up being an entire day ordeal which doesnt bother me at all. except for winter. f%*# winter. haha