My problem with ECH2O is how much to apply. Youtube says as much as you can, nothing is too much. Which brings me to my next problem with ECH2O, the microfiber becomes way too damp way too quickly and I might need 5 to 6 microfibers to do the whole car. And even then, the ECH2O spray gets into corners and areas that can not be cleaned by a microfiber like between the headlight gaps and other similar smaller areas and it dries out on me there...
I must be doing something terribly wrong. But so far, I've come to enjoy simple wash a lot more than waterless wash which is supposed to be easier but for me is not. I've got CarPro's spray which sprays ultra smooth particles. So smooth that a lot of spray flies away with the wind 