It doesn't sound like the most appealing thing but the stuff they use for braces or canker sores that numbs your gums works. It creates extra saliva that you would normally drool out if your mouth wasn't so dry.
Wow we must have very similar highs because I think SO much when I'm high, sometimes way to hard. And also with the thoughts relating to when I was younger, especially when I'm falling asleep. Even though I'm still pretty young.