Another tip is to laugh. I mean really work at it. Play mad libs with your daughter. Watch your favorite comedy shows. And when the action kicks up, play it down. Laughter sometimes demoralizes ghosts bent on scaring you.
Another approach: I once tamed a VERY noisy poltergeist (we later found on EVP was a woman who loved the house who died in the 50s) by just talking to her and telling her that if she calmed down and let me sleep, I'd play classical guitar for her before bed. I did and the noise stopped that night. New owners of the home I notice are having trouble there again.
The thing is these things feed on fear, disharmony, chaos and panic. Do the opposite of those things and yes, stick close to your faith. Counsel your daughter that some children can see and feel things that others can't and that it's perfectly OK. It will tone down her fears. Good luck to you. I hope you find a solution.