What would you do?

I have been watching a 9 month old baby for the past month, Monday through Friday . Every single day this baby is in dirty clothes, a FILTHY carseat, and comes with disgustingly dirty bottles (already filled with formula) which are put in a dirty and stinky backpack. Would you say something to the babies parents? I have already washed the clothes and carseat once. I also sometimes dump out the formula (which I feel horrible about) clean and make a fresh bottle. Their house isn't the cleanest but it's not that dirty. I just feel so bad for the baby. And I don't get paid enough to be constantly doing their laundry. HELP!!!!