Who gets to clean the bathrooms on AA’s planes?
I know your question was semi-rhetorical, but I have a an answer.
At Sea-Tac (Alaska's home terminal), the 'lavs' are cleaned between flights mostly by the flight attendants. Sometimes, if they have time, the ground servicing crew will come aboard and join in. If the plane has done its last flight of the day, then just the ground crew comes in and cleans the plane.
In Seattle, Alaska uses Menzies Aviation to load and service it's planes on the ground. Yes, that's the same company where one of the employees accidentally went to sleep in the cargo hold and took a short and unexpected flight not long ago.
I got this info from the Lovely Wife, who used to work at Sea-Tac as a ground servicing agent for Alaska/Horizon.