Hi James, the initial few weeks after RT are hard physically and emotionally. I'm agraid it will take some time before saliva/mucus gets any better. I'm now 8 months after RT finished and things are still slowly improving. I can eat most foods without drinking and when I struggle I need only a tiny sip of liquid to help things along. We all react differently so your experience won't be identical to any other but try to keep in your mind that you are in the lowest point regarding the side-effects of RT. As I write this, my mouth feeld pretty good, plety of saliva and not too thick. I'm a keen cyclist and the first time out on the bike I has to keep drinking because my mouth was so dry from breathing hard. Exercise does encourage saliva and I remember the ridiculous joy when after weeks of dribbling gunk on my shoulder when trying to spit, I finally managed a proper spit. So keep your spirits up and try to be patient.