Here is the real deal on passing piss tests, two hrs take 4 asprin and drink alot of water. Asprin absorbs the same wavelength as thc so false neg. I didn't believe, so I did a theory to practice. Will work as long as it is a dip test. smoked for 4 months straight and passes one. Any further guidance email me, I am well vewrsed in passing tests. I did a grip of time in the navy and smoked all 6 yrs!