When playing the harmonica for more than a few minutes, I'll often run into the problem where I produce way too much saliva, which all ends up inside the harmonica itself. Sometimes this even clogs one or more notes completely.
Most often, this happens when I sustain one note for a long time, blowing out. There's no possibility to swallow (because that will interrupt the note), so I don't know what I can do to keep this from happening. Is there some sort of technique that keeps your mouth from producing (so much) saliva while breathing out?