I know you say you've tried everything, but how many times a week does she take a bath or shower? I ask because, as simple as it sounds, maybe you need to increase how often she bathes and MAKE her go into the bathroom...For my kids, it's usually a minimum of three times a week during in the winter, but from how things sound, maybe she needs more. Don't leave it up to her to decide. You don't want to baby her, but she's nine years old...Many older kids still need a parent to be on their behinds.