DD is 15 and I've gone through oral hygiene multiple times. She has never had fillings and I make sure she goes to the dentist every 6 months.
However, she only brushes her teeth in the mornings before school/going out. She doesn't do them at night and won't both to do morning if we are not going out.
I find it gross! I've nagged and nagged but she doesn't listen.
Leave her to get on with it?