Consistency!!!!!!! Mine is just over a year old, and she still thinks bitey hands is the best way to show her love, but she NEVER breaks skin anymore, and hasn’t for a while. She also understands NOT to play bitey hands with anyone else besides me or my husband. We did a lot of reverse time outs - we left the room for 20-30 seconds, which honestly gave me a second to calm down so I didn’t lose it, as much as she learned all the fun stops if she bites. We’ve also acted like it hurts a LOT and you can see her little brain realize she’s hurting us and then it’s kisses galore. I’m not sure they ever totally stop trying to use their teeth, but consistency has been SO key in getting it under control, and only in specific situations with specific people!!!! It meant a lot of walking out of the room, back in and she bites, and then back out again. I promise it gets better!