The friends! Don’t think I’m the last but the last is more expensive.
I was noticed today that if the electric toothbrush is kept in one place (on the tooth), then in 10 minutes the toothstone disappears.
But the dental corporations hide this info. For each tooth, take 5000 to 10,000.
I hope everybody can afford this luxury. Just need to buy it.

Very useful info. Many odmines (including me) are lazy to go to the tooth...