Newborn bathing typically starts with a sponge bath around four days after birth, performed on a changing table by wiping with a washcloth to clean skin folds, avoiding full submersion due to the healing umbilical cord and potential stress for the baby. After approximately ten days, a shallow full bath can be introduced, with an emphasis on caution due to the baby's slipperiness and the helpfulness of assistance. Post-bath, maintaining the baby's warmth is crucial; this is achieved through immediate skin-to-skin contact, a warm towel, and feeding, as newborns have difficulty regulating their body temperature. While water is often sufficient for cleaning, gentle, sensitive-skin products or a small amount of baby shampoo for hair are options if desired.