While my dry mouth has improved considerably since the treatment days. my saliva glands are burnt toast (actually rock hard nodes)
I never found the Biotene gel or gum much help and still had to get up several times a night to swish water.(drinking it or sipping it from bedside was out as it triggered coughing and woke the wife) So I was pleasantly surprised to find that the Biotene "Moisturizing Mouth spray" actually works for me. I keep it on the nightstand so when I can just shake and spray at 1 am At $5 a bottle at Wal-Mart it is worth trying once. Also when I need to go without drinking for a period (the Washington DC metro subway system prohibits drinking even water and has hefty fines), it extends the time I am comfortable and its small and compact. Hope others may find it helpful also.