Dentist warns why you should never use mouthwash after brushing teeth

She’s calling hogwash.

Mouthwash has long been touted as a surefire — and minty — way to swirl away any germs not tackled by your toothbrush. However, one dentist is going viral for slamming the practice of using oral cleanser after brushing your teeth, as she says it can also rinse away beneficial fluoride found in toothpaste. “Using mouthwash after brushing your teeth is going to give you tooth decay,” London-based dentist Anna Peterson warned in a TikTok clip with over 1.8 million views.