My strips are slipping, is this normal?Updated a year ago

The strips will slide during the first week to 10 days. This is normal as your mouth needs to make room for them. After that period, they will stay in place quite easily. Also, they are working whether they remain over your teeth or your gums. The most important issue is to relax your face once you insert them. You must not tense any muscles around your mouth, lips, or cheeks.