Well first off dont buy another 'Herbal cleansing' they dont do shit. Ever. They tell you to drink lots of water with it too right? well thats basicly all it is is it just helps dilute your piss. I hear Niacin works well. I have a friend who uses it every time and passes every time. But I hear that its just a placebo or some shit. But I dont know. Cause as said ive seen him take the pills, go to the drug test and pass. When the night before we'd smoke a huge blunt.

Really now just exercise. Drink water. And stay away from super fatty foods. Theres not much you can do. Just wait. And when you do your piss test. Piss the first little bit into the toilet then the rest into the cup. I hear the first little bit would probaly have more THC then the rest.

And the day of the test try not to drink too much water. If your urine is too clear they can deny it.