I think if your mouth is dry, any THC might be even more concentrated in the sample they collect.

If you want to try being dry, take some antihistamines.

If you want to try to flush, drink a bunch of water between now and the test.

But not both. I'd try the latter.
mackSwell Reviewed by mackSwell on . Getting mouth swabb TOMMARROW at work! Well, im getting the mouth swabb drug test at work tomarrow. Is there any good ways to pass this even thouh I've been smoking weed everyday for pretty much 20 months straight? I was thinking about putting saran(sp?) wrap on the inside of my lower cheek, so it couldent pick up much skin cells/saliva? So anyone got any ideas? Thanks for any helpfull info. Rating: 5