How long before drug test do you drink assure detox?

Iv never tried strip but in most cases the detox drinks are best used starting two weeks prior to the test however I have known people who used them days before the test. Do not wait until the day of to start using your detox drink it will not be affective. This all varies on how much you smoke. If you smoke everyday then it will take longer to clense your system. Drink lots of water and cran juice, also limit your drinking and don't drink caffiene or soda while detoxing.