4 months ago I upgraded my C-pap machine to a Resmed 10 autopap. I’ve lost a few pounds and my face is a bit slimmer (that’s the only change) and now no matter how tight I make my mask I still get dried out. My humidifier appears to work as water does leave the chamber. I raised the humidifier and lowered the humidity and nothing helps. The machine reads (good fit). I have a nasal mask but I’ve nearly run out of ideas. I am very fatigue from poor and interrupted sleep. Please Help Me.

You may still be mouth breathing enough to dry out the mouth despite the machine not showing significant leaks. Mouth breathing doesn't have to be causing excessive leaking for it to dry out the mouth.

I assume no changes in any medications that might account for the dryness?