Doc,

I was unaware that chelating agents were classified as surfactants. I guess thats because I am a mere water boy, and not a H2o pHd (j/k!)

And yes, I agree, the chemical engineers worked overtime for the Mr. Clean AutoDry Carwash system. Pluses and minuses aside, I do like the inline filter (however small, and contact time however short) but then again if you are truly a detail (punny ) oriented car buff you will have a in-situ home treatment system.

I think the marketing guys hit the nail on the head for thier demographic: people who don't want to spend time drying or detaling their car but don't want spots.

Water=life