I'm not certain what chemicals are in the soap, but I noticed the same thing. Car nice and shiny, no beading. The filtration system on the Mr Clean delivers de-ionized water. We have deI water systems at work for different machining centers ... the water is pure. I have well water and some of the hardest water in our area at the house and hated washing the care with it. The Mr Clean system works quite well. I'm a nut, so I usually wax/polish the XF after a washing.