Once you fix the habit of unnecessarily chewing during the day, it can easily be repeated at night. Throughout the day, keep your mouth relaxed. If you control yourself during the day, you will soon automatically be doing it at night also. Hypoglycemia can be a factor. When a person has low blood sugar, he is more likely to clench and grind his teeth.
Some people find it necessary to wear a splint while sleeping.
Do not drink alcoholic beverages. They contribute to tooth grinding. With the trusting faith of a little child, we can come to our heavenly Father, and tell Him of all our needs. He will not turn us away, but will hear and help. The teeth are darker and more yellow than they should be.