@pslyuen She's not the type to respond to choices. Hygiene is non-negotiable. Pick her up and put her in the bath. Period. She can have her feelings, but the routine doesn't change.
@listeninginphoenix OP, BOTH parents suck. Your SO needs to lay off the beer. He knows what the night brings. Drinking so he can't drive is ridiculous. It's weaponized incompetence.
Both of them need a mandated parenting class. You should call CPS.