“Bacteria will accumulate greatly in the areas of the tongue between the taste buds and other tongue structures,” says John D. Kling DDS, of Alexandria, Virginia. “It’s not smooth. There are crevices and elevations all over the tongue, and the bacteria will hide in these areas unless it is removed.”
Rinsing the tongue won't just cut it. The only way to get rid of the bacteria is scraping it out with a scraper.
Be careful not to over brush, though. You don’t want to break the skin!