Rruuff day, I'm wondering about that as well. I actually ran a low pressure rinse before I used an application sponge as the product stated. I'd like to know from someone with experience if it's reasonable to simply grab a sponge and gingerly apply and remove this no rinse product to a filthy car....Personally I just can't bring myself to wash my car without a full soap soaking and rinse to get the dirt off before I touch it with a wash cloth. I have all the wash toys in my shop to be able to do this, including a floor drain. On the road on multi day runs, I have no worries about using a wand wash but I follow the same procedure. JMO