I've been swishing and drinking a bottle of aloe pulp juice every day since mid week 2 of tx when the saliva decided to cease the bulk of it's production. The juice is way better than you might think!
It's naturally thicker than water so it's a little bit easier for a weak or sore throat to swallow, is sweet with LOTS of empty calories to go along with the hydration, and SEEMS to soothe and keep my mouth clean and moist during the day (not the night - I think we all must sleep in the same Sahara desert!)

I've found it on Amazon, Trader Joe's and Whole Foods.
I also use the biotene dry mouth wash and see a big difference in the viscosity of my saliva every time I use it - so I'm a big fan of that product - as well as Tom of Maine's silly strawberry kids toothpaste - doesn't burn AT ALL!!!

I'm just about to finish week 3 (Half way - yay!) tomorrow so the symptoms I'm battling have not reached their maximum threat level just yet but I have been grateful for the positive effects they've had thus far.

Jennifer