Are you exaggerating? Or were they really brushing more than 3 times a day? Brushing obsessively and brushing hard will strip enamel that's been softened by ac

Are you exaggerating? Or were they really brushing more than 3 times a day? Brushing obsessively and brushing hard will strip enamel that's been softened by acids. Brushing right after a meal can lead to damage because the enamel hasn't remineralized.