It is EXTREMELY easy to pass a saliva swab test. Just quit for a few days, though its unnecessary since my close friend smokes the night before one of these tests. Anyway stopping prior to it helps, the morning of the test just brush the shit out of your mouth, i mean tongue, gums, cheeks everything. Then afterwords gargle with a bunch of mouth wash. Before you go into take the test smoke a cigarette and you'll be golden. Like i said these tests are super easy and nothing to worry about. Just follow my tips and relax friend, you'll be gainfully employed in no time!