excessive saliva

hello , my problem is i have been having excessive saliva for about 18 years, spit about 300 times a day, been diagnosed with, sinusitis,chronic bronchitis,asthma,since 1991, then went back to the doctor in 2001 then 2-4-08 and he told me (different doctor) i have acid reflux,sinusitis again,diabetes type 2 , went to a ENT on 2-14-08 he said there is no cure for excessive saliva, also put camera down my nose and said everthing looked fine except my nose is crooked inside, thats why i can't breath sometimes out of one nostril and i take the four way nasal spray 2 or 3 times a week, anyway i just need to cure my saliva problem,can anybody help or has anyone  had or have this problem. thanks