What can i do to increase saliva production?

Dry mouth : Dry mouth or xerostomia, can be a real problem and lead to cavities, saliva is your bodies natural cleansing mechanism. First of all there are many medications that contribute to this, including anti depressants , cardiac mediation, diuretics. Avoid alcohol based mouthwash which will make it worse. Biotene has a line of products that are helpful. Sugarless hard candy may stimulate your own saliva.

Chew gum: Chew sugarless gum or suck on sugarless hard candies. This may or may not be very effective depending on the underlying cause of your lack of saliva production. A more specific regimen which may be more helpful for your specific lack of saliva production would require consultation with a dentist.