Been a CPAP user for only 10 years now, haven't had a study in about four years, what is the AHI indicator,? Last I was told was my RDI was 97 and O2 sats dropped to 58 yeah severe sleep apnea... Feel like a dope asking but hey... I asked my doctor about the implant, that sounds sooo much better than CPAP sign me up!!
First off a couple of apologies , the delayed response, second I forgot you have a full face mask. I have a nasal mask, Ayre is a Gel that I have used in my nose for similar problems. ( also used it on airplanes to prevent dryness-infection) i have put a decent amount in my nose before "masking up". It helped with dryness from the CPAP. You can buy it in almost any drug store. Also the last time I experienced that same issue we found my CPAP was not getting warm enough. I have also ran a humidifier /vaporizer in the room to add moisture to the room air.
I have used Ayre in those situations during dry season. It has helped me...