Is there a urine additive that I can find around the house or easily pick up to help me p a home drug test?

Go to a head shop where they sell bowls and pipes. look online for the nearest one by you. They have a ton of things there you can try, I have done it, a lot of them work, also drink so much water you are going to burst before the test, gulp it, like two gallons. This will dilute your pee, and there is nothing wrong with smokin weed. GOOD LUCK!