I have chronic sinus issues so it was a struggle using the CPAP. The things that I found helpful was cleaning the mask portion very well every day, adjust the humidifier , doing a saline spray at night before using my CPAP. Also once I get tested for season allergies taking something daily for my allergies helped for me too. I hope these tips help.
Warmly, Brittany (SleepApnea.Sleep-Disorders.net/subscribe (Newsletter) Team Member and Advocate)