How do you pass a saliva test?

Rinse your mouth in hydrogen peroxide. I bought a couple of saliva tests online and this technique worked. The only thing I don't know is how long that "rinse" would work for. I took the test about five minutes after I rinsed. I know you have to rinse before you get there and may not be given the test right away.
Most drugs don't stay in your saliva too long, about 3-4 days. So if you can have that many days clean before a test, then you should have no problem.