if you have a breakroom with a snack machine, a coffee vending machine, trash bin and let's say a tv and couch you should be good.
do they have access to the break room? do you give them breaks and also send them home after opening hours so they can go to sleep?

I am pretty sure I had all that but I will look into it.

does it matter? can you hire more?

Make workers rest at least once every 6h when working 6-19. For cleaners you need another shedule.