When I drove transit buses a few years ago I started using disposable wipes throughout the bus before I started my run.
I would clean all the insertion slots at the fare box, metal poles, pull cords, stop-strips, seats and handles.
An unanticipated result was that riders were smiling at each other more often and many arguments between riders stopped altogether.
Maybe riders could smell the lemon freshness at the very least. I thought that if riders could feel comfortable about touching surfaces without having to encounter
an occasional sticky pole or seat then they were more likely to come back more often and even buy a pass.
Here's Amtrak's Coronavirus web page: