One whack on her head with a baseball bat will shut her up ! Seriously --she`ll get bored and be on to something else soon ....if she persists, tell her in no uncertain terms that you`ve used a product on your hair and that it`s really none of her business and you`d appreciate if she`d keep her personalised comments to herself...that`ll do the trick ---- speaking to a person like that, in that manner, is, unfortunately , the only way to give her the message ! Enjoy the new you !