I get random drug tested how do I pass

I’m M 6’9 200lbs, I will get random drug tested this year, until about 4 weeks ago I was smoking 2-4 time a day, I have had one smoke which was a small amount of weed mixed with tobacco about two weeks ago, I could potentially get tested as soon as next week. I’m thinking about using the Certo and Gatorade method along with daily creating starting tomorrow. I would appreciate Any advice or recommendations? Thank u my fellow gardening enjoyers