Here are a few steps to ridicule those THC metabolites out of your blood, urine, and feces.
1. Drink plenty of fluids, especially water. Mainly anything that consists of antioxidant inhibitors, this will eradicate all the free radicals in your body.
2. Exercise, and plenty of it, your sweat glands expel all the excessive radicals in your body as well. You're basically cleaning yourself, through running or body workouts.
3. Take vitamin supplements that have all the necessary minerals and vitamins you need, to sustain a strong response on cleaning your immune system.
4. Eating more often, can contribute to more bowel movements, so its best you excrete as much feces as possible, so that less THC is exhibited into your body.
5. Sleep at a normal time frame, and get at least 8 hours of adequate sleep, this will make your bodys defenses rise and destroy most of the THC throughout it's half-life.
I don't have any other ideas at this point and time, but this is possible, and can be achieved if you put your dedication to it.