Can a saliva test detect THC?

First thing you need to do is not smoke any more pot! A saliva test does not detect delta-9-tetrahydrocannabinol for very long. So if your a week clean you should not have any thing to worry about. If you have to take the test right away wash your mouth out with water and use a lot of toothpaste. I would not suggest using mouth wash to soon before the test, because saliva tests also check for alcohol. You can also try keeping the swab a dry by holding it in your teeth, and puffing out your lip with air so it appears to be in between your lips and gums. However, this is risky and the test administrator might know what your up to. Spitting out every bit of saliva might also be a good idea.