ive always thought it would be good to make public items with a built-cleaning loop.
an escalator could have a steam/preasure-washing section that the stairs loop through as a part of the system. it could even work when the escalator is in use.
a publi toilet could have a round seat cover that also spins into the same type of washer in the wall.
an elevator could dock at the bottom level and couple to a drain and water/steam pour in from the top.
There are in fact self-cleaning public toilets that ranges from "just" washing the seat, bowl and floor to full pressure washing of the entire interior.
an escalator could have a steam/preasure-washing section that the stairs loop through as a part of the system. it could even work when the escalator is in use.
a publi toilet could have a round seat cover that also spins into the same type of washer in the wall.
an elevator could dock at the bottom level and couple to a drain and water/steam pour in from the top.
the city could provide more restrooms.
clearly these issues can be designed around.