Since i am a smoker of cigarettes, I have been extra cautious, especially sine I was also working retail.
The diary wash goes back a few years, to render the tobacco mosiac virus (TMV) inert, maybe back into the 70's,
but never had a plant returned, nor contracted the TMV
I have used full milk and 2 % milk as anti-virus agent. No difference but not wiped off, just eventually dry during gardening persuits.
It seems to choke of the virus
Amazing. I wonder if it works for other viruses as well.