Bedtime bottle

This peanut is 9 months old and I’ve ALWAYS given her a bottle before bed. She usually drinks 6oz and then sleeps 11-12 hours. At her 9 month checkup her doctor mentioned I shouldn’t let the milk sit on her two teeth overnight. So I tried feeding her and then brushing her teeth but it wakes her up and then she’s awake for over and hour just crying and being a turd. Ughhhh. I don’t want her to not be able to go to sleep without a bottle and I don’t want her teeth to suffer but I seriously don’t know how to break the habit. It’s a total comfort thing for her. I need tips!!! (She doesn’t go to sleep for naps without a bottle either 😬). I feel bad because I didn’t realize this was a bad habit to form until it was way too late!