If i haven't smoked pot in2 and a half weeks, what would be the cheapest way to flush my system?

Sweat/exercise a lot before then, but not the day of the drug test or the day before the drug test.You should be sweating, drinking lots of water, and don't eat fat foods. Eat lots of high fiber foods (the metabolites cling to the fiber and you poop it out ),takedaily multi vitamins and vitamin b-12 (add creatine),start testing yourself. ("one panel thc test kit" run around $4-$10)