Cleanliness does not really matter that much. There is little evidence for mass surface transmission.
This is a disease that is spread by breathing in air contaminated by a infected person coughing or talking.
This is a disease that is spread by breathing in air contaminated by a infected person coughing or talking.
Nobody uses the phone (it's bad manners here), so like the only time anybody talks is like when a group of people gets on together (not usually the case when I commute).
I mainly bike so my subway experience might not be very typical, but it's one anecdata point.
Almost all my subway-riding experiences this year have been such that 95% of the other passengers are wearing masks, and nobody talks.
Can't be the main factor, but it might be one factor.