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.
Pot does not come up as Salvia, they are 2 different drugs.
Anyone can buy salvia online so the use of it can't be controlled. Try to drink lots of fluids in order to wash out everything in your system. Brush and gargle too several times to wash any substance stayed inside your mouth.
No it takes at least 30 days