I have not had radiation, so I wonder why I am even presuming to add a comment, but I do have a dryness problem for other reasons following my surgery. I use a small laundry/plant mister bottle with water in it. I spray my throat, and it is wonderful. You get the sensation of having a drink, without actually having to swallow, and without having to deal with taking a liquid in at the front of the mouth and having to move it to the back. This has been a very valuable tool for me. Just open your mouth, and spray back in your throat....cool mist....swallow or not.

I also use a smaller spray bottle for Biotene mouthwash, which I spray several times a night to moisten my mouth and teeth. It lasts longer than water for this purpose. Often, I will get my mister-drink, and then follow that with a few sprays of Biotene in the middle of the night.

Would this work as a starter?