Assuming the cars have internal cameras they should be able to surcharge riders who trash the cars.
Like others said: the second they have run drivers out, the cars will stop getting cleaned obsessively because you won't have a choice.
Same thing that happened when Lyft and Uber when they ran the taxi industry out of business.
Same thing that happened when Zipcar was established. Cars went from being spotless and well maintained to damaged, dirty, and half the dash being lit up.
I will have a choice. I will choose one of the competitors.
> Same thing that happened when Lyft and Uber when they ran the taxi industry out of business
There's still a taxicab industry in San Francisco. It became better after competing with Lyft and Uber.