Months ago I rinsed all my change when I came home and washed my hands - like a good little girl/moron. I stopped doing it. Can't see the problem with cash and our local PO and most shops don't do cards. No problem, no-one, except a couple of oddities, wears a mask and there is a nil Covid infection rate until you reach our market town (10 miles) when there were a couple a few months ago.
Impossible to ask for card only. Most pensioners here draw their pension in cash - none of them has a computer and couldn't/wouldn't use it if they had one. The 'up front' ones need to get real to reality.