Pretty tough to do for anyone, but if you know when your tests are then you can substitute using Quick Fix. If not then I would advise you to quit smoking or smoke only right after your tests for a short period of time. Depending on your body weight and metabolism a one time smoking session can stay in your system for 5-7 days. Another way for you to narrow down how long it takes for you to get clean would be to test yourself. Sit down and smoke one night and then test yourself daily until you come up clean. Ebay has the cheapest test strips and this would be ideal for you. Keeping yourself hydrated, exercising, and taking metamucil will also help you to clean out faster.