>Who does all the cleaning?

In some cases that would be the same person that does the most advanced innovative and/or creative work.

The idea behind the fully automated system is that fewer hired hands are needed for efforts that are routine enough. But not zero, you still need one person who can do everything at a minimum, if called upon for mission-critical operation.

In the case of the creative work and planning where it is out of the league for AI, these things need to always be done too, but they are not exactly "routine".

Once most of the tedious routine tasks are well-automated though, then the human brain behind the lab can finally relax a bit, with eurekas flowing at the same rate without needing a full 40 or 50 addititonal hours at the bench any more, while even more results are generated than they could do single-handedly too.

Which gives them the time to do the cleaning also, otherwise they would need two humans to serve their only automated system.