That's the key, you just have to get her to stop ingesting the poison.

My father in law watches Fox news. Whenever he comes to visit us in Europe he spends the whole time oo'ing and ah'ing about life here and swears he understands that Fox news is propaganda.

Then he goes back home and two weeks later my mother in law is complaining that he's got brain worms again because he started watching Fox to get Both Sides™.