Hi there sorry you're suffering with the dry mouth. I found a thing called Xylimelts which I purchased on EBay is really the best especially at night. It's a bit expensive but well worth it. For the sore spot, I use paw paw ointment. Also there's a toothpaste I buy on EBay called Squiggle. It's the only toothpaste that doesn't hurt. It does have some fluoride. Good luck with it all.
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