What were they selling? Not washing doesn't seem to provide many business opportunities that I can think of. Posies?
I bought the Mist on a whim after chatting with someone at OpenBiome (AFAIK unaffiliated). I figured I’d try using it instead of face wash for a few months as a little experiment to see how my skin felt.
Well I have lupus so I sometimes get the “butterfly rash” across my cheeks. Anything from hot water to alcohol to a cold can trigger it. I hadn’t even considered that the mist might help with it but I was shockingly and pleasantly surprised that over time the butterfly rash became much more faint so I just kept using it.
It’s entirely possible that it’s the placebo effect but when I get the butterfly rash now it’s imperceptible to anyone who isn’t looking for it. If I were a true scientist I’d stop for a few months and see if if returns with the same intensity but I guess I’m too vain.
But all of my knowledge in this area came from someone trying to sell me something so it should be taken with a grain of salt. I'm sure there's a microbiologist somewhere on HN who could explain the relationship between soap/skin microbiome much better.
[1] https://www.ncbi.nlm.nih.gov/pubmed/15275864
[2] https://en.wikipedia.org/wiki/Nitrifying_bacteria