How hard should I bite?Gently bite on the mouthpiece just enough to hold on.By SSC Admin|2021-09-25T10:12:50+10:00September 10, 2021|Smartsoother|Comments Off on How hard should I bite?Share This Story, Choose Your Platform!FacebookTwitterRedditLinkedInWhatsAppTumblrPinterestVkXingEmail About the Author: SSC Admin