I used to smoke multiple times a day and had to take a test about 2 months ago. I smoked up to ten days before and bought the chronic cleanse off that website. I took it for 8 days but failed my drug test. It could have worked but I didnt do it totally right. I exercised for a day straight before, not of my choice (it was a military school) and I did not drink enough water or exercise enough before I got there. I think it would have helped if I drank more water and exercised a lot before. If you know when the test is I suggest dilution or even better substitution with the urinator or something else. Good luck