Some babies love being in the water, and giving your baby a warm bath can become a fun and relaxing ritual. That's not to say you have to bathe your baby every day. If your baby is newborn, a bath two times or three times a week is enough to keep him clean (AWHONN 2013, NHS Choices 2013) .Bear in mind that if you live in a hard water area, too much tap water may dry out and damage your baby's skin (Arnedo-Pena et al 2007, Blume-Peytavi et al 2009, Chaumont et al 2012) . For newborns and babies up to six months old, fill the bath with about 13cm (5in) of water. 2  Or just make sure there's enough to allow your baby to settle in the water with his shoulders well covered (AWHONN 2013) .