Not for nuthin’, but if you saw the cleaning stuff they use in the hospital you would realize this is not really an issue.
We used to call them “cancer wipes” because they were so strong we “knew” they would just give you cancer after a few years. (They didn’t)
Copper turns color and “looks” dirty. Patients and visitors go on looks, not reality. It would take an army to keep that stuff looking good.
Copper alloys do not.
Actually, it seems alloys work almost as good as the copper itself. You only need a little copper to do the job. Cosmetically it’s a wash.
A spray of white vinegar turns copper right back to that new, shiny-copper-penny look, in no time ;-)