No matter how difficult it is to be alone with the kids and take care of all their needs, there is no excuse for not cleaning them properly at diaper changes or not cleaning their dishes etc. This is a health hazard and sounds like it describes the caregiver's overall lack of care. How terrible to have to go through this. As a mother I have always had a hard time trusting others to care for my kids, which is why I opened my own daycare. I hope you now have a good caregiver.