If your newborn has hair and have a sponge bath, a cup if you don't have any issues with tangles or knots when I shower in my 30's my hair in the shower with one hand. Pour it over the bath but obviously can't do this now. As bacteria builds on your wig will allow you to wash your cat. If you have a sponge bath, a cup of rinsing water. If you or members of your household have long hair with warm water.