It seems if you generally follow the instructions on the detoxify product you will dilute sufficiently to pass. Some on this site will say otherwise but I know of several people who have successfully passed tests using detox products from head shops. Definitely check out the dillution string in the drug testing section of the forum home page. It will basically do the same thing as the detox product but at a much lower cost. Basically you just dillute your pee so much that you pass the test. No detoxification actually takes place.