Newborn soap: tiny amount
A little goes a long way.
NewbornSkin
Use a very small amount of gentle cleanser (or skip soap on calm nights).
Wash body first; hair only if needed.
Rinse well—leftover soap can irritate skin folds.
If you can smell the soap strongly, it’s probably more than you need.
Note: These are general tips only and not medical advice. Always follow your pediatrician’s guidance for your child.