Shops etc, i use card or my phone (contactless)
I have a very small handful of clients who pay by cash and thankfully its either coins or plastic notes.
In the van I have several cleaning products, either one will kill the virus and if we are keeping to washing our hands, then you guys do as well.
I have a tin which it goes into but before it does, it will get a spray and a clean first. Afterwards my hands are cleaned and all is good, back to work I go. (Dont harp on about making it complicated, it doesnt take that long at all, seconds in fact)