The tongue's surface is the main breeding ground for harmful bacteria that attack teeth & gums producing a rotten egg - smelling gases or dragon mouth ! Tongue cleaning is necessary in addition to brushing for a thorough dislodging of the plaque and mucus. In clinical tests tongue cleaning is proven to have reduced odours and bacteria by 75%! Tongue scraping with a Tongue Cleaner is a boon for those suffering from coated tongue. Effective tongue cleaning reduces coating on the tongue by as much as 40%!! The best part is that a tongue cleaner is so easy and fun to use. A myth widely believed is that the stomach is the root cause of bad breath. Bad breath from the stomach is so rare that of a thousand people treated for bad breath not a single case was caused by stomach problems. Tooth brushing and mouthwashes do nothing to remove oral debris on the tongue the root cause of bad breath. At best they mask bad breath. Tongue cleaning is by far the most effective way of combating bad breath.