I tried brushing my teeth with organic vegetable glycerin before going to bed and it did help dry mouth a lot. However, it also helped to simply add about 1/4 to 1/2 tsp of the glycerin to 2 cotton balls that I put on one side of my mouth by the molars. No, I never choke at all from the cotton balls. It seems we have an instinct to protect us from such a happening, even when we sleep. If you get really desperate also try taping your lips shut before you go to bed, too. You can use a band aid (I like Tough Strips) going in one diagonal direction so that the sticky stuff isn't pulling on your fragile lips, and a piece of Nexcare paper tape going in the other diagonal direction over that. Keeping the mouth shut at night does help with dry mouth.