How to get rid of coffee stains?

[deborah_debris]

Hi there, My younger sister is very much addicted to coffee. She drinks it at any time. This has caused stains on her teeth.
She doesn't bother about it but my mom is concerned and is behind her to get it cleaned. I have researched online for home remedies and she has been trying few of them such as rubbing her teeth with fruit peels, oil pulling, and kaolin clay. She has stopped doing it as she can't see any changes. I told her it is because she is still having the coffee. I advised her to stop drinking coffee for a while and get rid of her stains. She said some of her friends has undergone teeth whitening procedure from a dental care clinic in Kitchener. She too needs to undergo the procedure. But I just wonder if it's safe for a 15 year to undergo this procedure. I think there is no point in undergoing this procedure if she is continuing to drink coffee. I don't know how to stop her addiction to coffee. Is there any suggestion? Thanks!!