90% of halitosis also known as bad breath comes from the tongue.
In addition to brushing and flossing, tongue cleaning should be a part of one’s daily oral health regime. A soft bristle toot brush or a tongue cleaner can be used to remove the bacteria that can accumulate on the tongue. Whether using a toothbrush or tongue cleaner it should be placed on the surface of the tongue close to the base and pulled forward pressing lightly against the surface. This movement is repeated to cover the entire surface area of the tongue.
Don’t forget to rinse your toothbrush after each brush.