So do you think that the mucus glands in the air passages are what cause us to spit out that thick white mucus after swishing with oil? I remember asking on this board about what that mucus was and where did it come from but I never got to read the answer because of the website crash. I did get an email notice that (I think it was Molly) someone replied to my question. Very interesting. Thanks for posting. (refreshed 48124)