Hello @pnlees I have dealt with dry mouth for 14 years since surgery. I avoid the sprays because of the irritating base that causes the stinging. I use the dissolving tablets and gels. When canker sores appear I try to use Abreva topical cream which is meant for sores outside the mouth, but can be applies with a Qtip inside once you dry the lesion. It shortens the painful period and helps healing. I also use an ultrasonic humidifier beside my bed at night and make sure I am very well hydrated during the day. Sometimes an electrolyte drink is more hydrating than water. Staying hydrated is such an important part, I have found. Boosting your immune system can help to fight this also. Research beta glucan which is found in mushrooms and yeast as a good stimulant. I purchase Glucan Elite via Amazon as the processing is important for efficacy. Cheaper is not better. There are other mouth washes specifically for pain which I have used in the past along with Biotene. The oral lidocaine gel is a good temporary fix to use prior to eating. Take your ENT up on that suggestion.