Start by wearing the Functional Activator for short periods of time and gradually increase the time you wear it. This will allow you to adapt to the position of your tongue and breathing without discomfort. The goal is to be able to wear it all night long. Remember to keep your mouth closed while using the Functional Activator and practice breathing through your nose. You can start with breathing exercises for smaller periods to build up your tolerance. With time, you won't have to do anything consciously while wearing it.