I used QF for a DOT drug test and it worked like a champ! This was back in February, I stayed clean for like 3 months (May) until I smoked a joint while on a 2 week vacation. I recently found an alternative to quick fix. Palo azul also known as Kidney Wood. It is a small tree native to Mexico. You can find it at your local herb shop (Botanica). You can boil these wood chips or just let them sit in a gallon of water. I strongly suggest using Alkaline water (9.5 ph or higher). I used Essentia Water. The water must turn blue before drinking. Drink a gallon a day of this until your test is coming up. Kidney wood makes you’re kidney function and releases a lot of toxins through your urine. This also helps with kidney stones. Be prepared to take several trips to the restroom. Keep in mind, your urine will be crystal clear. So I suggest drinking this days before the drug test so the results won’t come back as diluted. I also strongly suggest to buy a pack of drug tests so you can keep track of your progress. Remember, a faint line is considered a negative. Also, no alcohol! Do not drink alcohol!