How do you pass your urine drug test in 1 week?

I start to work in the place where they tests us every 2 months for drugs, believe me it's not fun. I like smoking just to get relaxed after a tough day. I know all kind of ways to get THC out for my body. I tried everything from drinking a lot of water and working out to all kind of detox which they cell. And believe me I can say that it is different time. Sometimes it works other time no. Weird though! So what I make for last 6 months - one or two days before my drug test I bought a single panel THC kit from CVS and home test myself.