A tongue cleaner is an oral hygiene device designed to clean the bacterial build-up, food debris, fungi and dead cells from the surface of the tongue. A tongue cleaner is a very important part of your dental hygiene. It is necessary to clean the tongue 1-3 times a day. This will clear the congestion on the tongue and throat. Moreover, as all the meridians pass through the tongue, little massaging of the tongue with a tongue cleaner will activate all the organs below the diaphragm.