Brush, clean and floss your teeth well and your teeth will remain fresh and healthy. Or not? No, say the mouthwash sellers: for a really spotless mouth you have to use mouthwash. Good for eternally fresh breath and no more cavities, the bottles say. Rinse twice a day for minutes with: yes, what exactly? The Keuringsdienst puts on its best smile, dives into the mouthwash and discovers that appearances are sometimes expensive.
