What could I start to change in my diet to get rid of any trace of cannabis?

well i went to gnc and i went to buy this all body cleansing 7 day detox on sale for 34.99 and after looking for like 30 mins. with my homie the asshole clerk says to me that they can't sell it to me because it was for a drug test. WTF has this world come too...fucking governemt has brainwashed the shit out of peeps man. So iama try this so far iam drinking like 2 gallons of water a day, like 6 pills of vitamin b and its 200mg and soon iama try to get another detox. Also plan on doing the vinegar, and some cranberry juice. Uh i cant wait to smoke again... thank u all ill keep u updated. Oh also i plan on buying one of those homekits for drugtests where can i get one?

thats bullshit that they wouldnt sell it to you. you would think they wanted to make money, not turn away customers...who might be return customers at that...