Dry Mouth with Nuance Pro gel pillows mask

I have been using a full face mask for about 9 months. I read that the pillows mask may work better for active sleepers, however, my mouth dries out to the extent that my cheek sticks to my teeth. I have a chin strap on order but I don't think that will solve the problem since I observed air whistling through my lips with my mouth closed.

Can anyone recommend any sprays that will keep my mouth moist through the night? I am open to any other suggestions related to the topic. I have only used the pillows mask for two nights.

Biotene makes various products specifically to help with dry mouth.

Couple of things to consider:

1. Nasal rinses and maybe corticosteroids to really open your nose up
2. Humidity may need to be low or high to suit you, don't assume high is necessary
3. Practice deep nose breathing (even when a little congested) and keeping your tongue high and behind your teeth

All of this seems to work better at higher pressures (10+) when you can blow your pipes open with the pillows.