hello
normally around 1500 ml of saliva is produced daily
now if you say that you have it constantly than you must be meaning that its in overflow i.e. it comes out while speaking and your oral cavity seems always full of it
there are many causes for oversalivation which includes -
salivary gland disfunction,GERD,ill fitting dentures or removable partial dentures,cavitis in teeth which engulf food particles,
gingivitis or
periodontitis leading to impection of food particles in between teeth,etc etc
also people working in heavy metal industry are also prone to this problem
tuberculosis may also lead to such problem
what i would suggest that you visit your local
dentist and get your total examination done
in the meanwhile you can do following
1.use alcohole free hexidine mouthwash 2-3 times a day
2.try to keep a some ginger or clove in your mouth that would enhance dryness
hope this helps