My daughter's just turned three and has always been a hair twirling thumb sucker. It never really occurred to me to worry about this but a recent trip to the dentist revealed that her teeth do not meet when she bites and her jaw is being pushed out of line. Since the dentist trip I've tried the varnish type product that tastes bad whenever she sucks her thumb. She quickly figured out that it only tastes bad for a few seconds and so the sucking continued. And I've tried gently telling her to stop sucking her thumb whenever I see her at it. She immediately pulls her thumb out but within a minute it's back in - without her giving it a thought the thumb just goes back to her mouth. How do I break this habit? She has a sore area around her mouth and base of her thumb now. Will she just outgrow it? Any help will be much appreciated.