G.B.
In child care we're required to have a plastic covered pad to protect the baby's head. It can be quite painful if they accidentally pick up their head then drop it down. They do need the pad. They don't put anything over it, they just make fresh bleach water each day and spray it down after each baby is changed. they can let it air dry, that is the most sanitary by far but if they have multiple changes needed they can simply wipe it down with clean paper towels to dry it before putting another child on there.