Any parasite that affects the lungs can cause a person to drool. This is because roundworms, for instance, hatch in the lungs and their presence and toxins in the lungs can cause some upper respitory problems.
Humans breathe naturally through their noses and only breathe through their mouths at night when upper respitory problems are present.
I normally recommend lung clenses for people with drooling problems. The cleanses you just finished most likely affected your lungs in that the lungs are purifying organs and had to help remove toxins.