Do my teeth need to be dry before doing the treatment? June 07, 2023 13:30 Updated Yes, after brushing your teeth, dry them with a paper towel or tissue. Related articles How do I ensure proper fit? Do I apply the pen on the tray or on my teeth? How do I use the pen? After one use of the pen, the bristles are stuck together and gel does not seem to come out, what should I do? What's included in the kit? Comments 0 comments Article is closed for comments.