aside from the fluoride poison they add to mouthwash they also add methanol poison. better to just go with some whisky, you can even swallow it for its health benefits :

- lowers rates of heart disease
- fights cancer
- promotes weight loss
- reduces stress
- cures diabetes
- reverses dementia
- cures colds/flus
- aids digestion 
- reduces blood clots
- boosts immune system 

"Don't take medicine, gargle poison instead" -- Dentist "doctors" 

https://liquorloot.com/blogs/articles-blog-post/10-health-benefits-of-whisky