Shut your mouth and breathe only through your nose. This is the CARDINAL rule!! And you MUST sleep on your lefthand side. If you continuously still get a dry mouth then yoiu are still sleeping with your mouth open and my bet is that you wake up on your back and therefore probably snore as well. It is a very simple procedure to cure this. Do not panic but tape your mouth up at night so that you are forced to breathe through nose. Persevere and your problem will quickly be solved.