I hate using fake pee, its so nerve racking! Go to amazon and search for "CertoClear", its a green powder packet you mix with water. That stuff worked for me and a co-worker that had to take a test practically on the spot
I pass recently, I used this stuff my friend told me about from amazon called "CertoClear", two packets in like a half gallon of water a few hours before the pee test, pee'd a few times then gave them the sample. I smoked a few by accident the night before and it still worked.
I think you can...