air is drying out my nose and I can't breathe!

I switched to hybrid mask. (resmed Airfit F 30). I find the mack comfortable and less constraining but I constantly wake up 1- 3 hours after falling asleep with nostrils completely dried out. I have tried so many things- adjusting humidifier , not sleeping with ceiling fan turned on. I use saline when needed but would love to have some suggestions . I do like the hybrid mask as opposed to the FF mask over nose and mouth. I just want this to work and its been 18 months and I constantly am waking up EVERy NIGHT

1. If you fill your humidifier tank at bedtime, how much water remains in the morning?

2. Are you sure you are drinking sufficient water during the day? They say 64 oz. under normal conditions.

3. What is the climate in your area like? If you don't mind, which city?