The parent of a newborn asks, "why do i have to scrub my baby's formula bottles?" which information regarding the normal newborn should the nurse consider before replying in language that the parent will understand?

The nurse should inform the parent that the reason that they need to scrub the baby's formula bottles because the newborn does not have a well developed immune system as it still young and by that, it is susceptible for acquiring disease, that is why the formula should be clean and well-scrub to avoid any necessary germs that the infant could acquire.