Certain foods will make your mouth produce more saliva... other than that, I'm not sure there's a way to make them "work better", unless you are having an issue with "dry mouth" which can be caused by dehydration, illness or even certain medications... If that's the case, drink more water and/or visit a doctor. :-)
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http://www.instructables.com/id/how-to-spray-saliva-straight-from-the-glands/
that interestingly turns your glands into squirt guns for fun and
explains .how can you make them work better..
A
Aggh no spell checker for Morse!