I do understand your point about the toilet. But do you parents have the money to fix it/hire a plummer? When you start to get older a lot of elderly people start to worry about having enough money to live on and just pay the bills. If they have the money and just won't spend it that is one thing but do the really have the money? And still if they don't want to fix it you can't force them to. I'm in agreement, with the others, it's their house. And chances are you are not going to change them at their age. Let them live out their years the way they choose. Been in your shoes and tried to force change, it doesn't work. Hope you can accept them the way they are.