Your instasmile is custom made to fit your unique smile, and as such it won’t fit anyone else. If there’s a problem with your instasmile, please check your warranty to see what’s covered, and let us know of any issues as soon as possible. You can do this by sending us a picture or video of your instasmile, clearly showing the fault. Please don’t send us them back unless we request them. Due to hygiene reasons, we can’t accept returns.