Too many liquids consumed during a session or just before is right on. And don't sit there drinking coffee with cream, either, b/c that just makes it worse (I'm a little miffed about this b/c a talent continues to do that in my studio and she has the worse mouth noise ever and yes, I've asked her to stop).
Don't have pizza before a session. Not only is the cheese going to make your mouth all clicky and poppy but pizza actual makes you sluggish. I learned this the hard way when I used to record bands.
I'm going to try the cranberry juice thing. Or maybe I'll just pop a frozen cranberry in my mouth and see if that works. I mean, not that I ever have mouth noise but just in case ;).
Good suggestions, all. Here's our research and what we teach our students: Hydrate the day before your session. Bring some room temperature water to sip, not gulp, and slice a green Granny Smith apple (leave the skin on) and bring some slices to the session in a Baggie. Just a bite of a slice should help. Avoid dairy product up to four hours before a session, no caffeine (coffee, soda, etc) up to an hour before.
Boy! You are dead on about the 416. That's what I use and it's unbelievably sensitive to anything in front of it! On the other hand, let a plane fly over or some motor run outside...nothing! It never ceases to amaze me. The only thing that seems to cut through is a phone ringing in the background. ARRRRRGGGHHHHH!!!!!!
OK, days later and I had a chance to go for the frozen cranberry. Puckered me right up and helped for about a minute with the extra gunk noise in my mouth. I needed a couple more to get through the session but it worked!
OK, I'm avoiding dairy, eating apples; no, BITING apples, drinking luke warm water, pressing my cheeks, licking my shirt, sipping diet cola, avoiding pizza, (*SOB!*), carrying around a jar of Grape jelly, and drinking cranberry juice.
I just heard about this stuff again too.......heard about it a few years back but forgot about it. Just came up again in something I read recently although I've never used it so try at your own risk but I've heard a lot of good things...... http://entertainerssecretthroatspray.com/