Is it necessary to clean the tongue and how to do that?

Cleaning the tongue can help improve taste perception and contribute to the overall cleanliness of a baby’s month. It can also help reduce bad breath and minimize the chances of infections. Most of my friends simply use a gauze (wrapped around the finger), moisten in warm water, and gently rub over the surface of the tongue. (One of my friend is using Nuk Oral Wipes. Available at guardian, $17.20: http://www.guardian.com.sg/oral-wipes-25s/p/129566) To facilitate the process, you can try cradling your baby with one arm and clean his/her mouth with the other.