Getting the facts straight about detoxing and THC?

Im just trying to find out if there is anything out there that isn't a complete scam. Ive read countless amounts of forums and threads to see if there is anything to help with the detox process. before you answer, please know im not trying to do anything stupid like cheat a drug test or magically cleanse my system on the very same day of my test. i quit smoking a little more than a week ago and have somewhere between 1 to 2 and a half weeks more to get the job done. id say that i have a fast metabolism, rarely drink anything other than water, and only weigh around 130 pounds. so far, the only plan that sounds remotely reasonable to me is to exercise, sweat, and keep hydrated because every other suggestion seems to get shot down by some anonymous internet know it all. i would also really appreciate it if you could try to explain your reasoning behind why your suggestion works. Thanks.