I’m a late 90s mum so…… if my lo bite me or others I bite her back lol. It works for my lo, she stopped biting after the second time 😅. Of course, every parenting style is different, you can try to explain to your toddler that if they bite others it will hurt others and also hurt their own teeth etc etc. Then offer them a harder snack (not to the extend that it will hurt their teeth of course).