Mask leaking or not fitting well
Air escaping around the edgers of the mask, causing noise or eye irritation.
Feeling uncomfortable or suffocated
Sensation of difficulty breathimg agains the air pressure or feeling trapped.
Dry nose, throat, or mouth
Waking up with significant dryness despite using the humidifier settings.
Waking up tired despite use
Continuing to experience daytime sleepiness even using the device all night.
Removing the mask during sleep
Finding the mask off in the morning without remembering taking it off.