My pedi said you can tell when your baby is dirty and to bath based on that could be everyday could be once a week. I was told to just moisturize really well. My daughter had to be bathed a lot when she was little because she i kept leaking breastmilk into her neck
I been taking my son a bath like every 2 days or so unless he needs it.like milk always falls on his neck and as much as I clean he ends up stinky and I have to bath him.