When you get Invisalign, you need to plan on wearing the aligners for most of the day. They should stay in your mouth for at least 20 to 22 hours every day. You should only ever take them out of your mouth when:
You’re eating a meal or a snack or drinking something besides water; OR
You’re cleaning the aligners and/or your teeth.
Once you’ve finished with your task, put the aligners back in your mouth immediately. If they’re out of your mouth for too long, your treatment time could be extended. Don’t forget that you’ll need to trade your current aligners for new ones every two weeks.