Brush your teeth a lot. Don't use the mouthwash --- it has alcohol in it; which will cause a false positive result if the company is testing for alcohol also. Instead, get some cinnamon Altoids mints and put several in your mouth at a time. Even while your waiting for your test to begin; well, if you want. Anyways, I did this and passed my swab test no problem. I am a daily smoker.
