I like Cottonmouth Candy, search it. They're sugar-free but don't taste nasty like some sugar-free does. They come in two varieties: regular fruit mix and sour mix. You can get them online and I've seen them in drugstores & a walmart pharmacy while in America this last summer. Lots of medications can cause cottonmouth and these are recommended by doctors for that. I was surprised how much I liked them.
I also think that folks in general don't drink enough water daily. I'm not talking about sipping water while you vape which is great, but being sure to drink water rather than other beverages throughout the day.