Drink plenty of liquids, before meals, before bed, throughout the day. I use biotene dry mouth products too, use a soft tooth brush, even a baby one or sponge type. Sugar free hard citric candy, gum, drinking lemon water produces more saliva, as well as smelling lemons. Taping mouth closed with medical tape before sleeping may prevent moisture loss during the night, check with dr. Caffeine, alcohol drys the mouth, even in mouthwash, so avoid those. You may want to see the dentist if sugar is bothering the teeth episodically, which sounds like cavities or demineralization of the teeth. Good luck.