Every time I smoke weed

Every time I smoke weed and they pee test me it comes out negative why dos it do that and no am not smokeng k2 am smokeng lots of different weed and it tills come out negative why dos it come out negative?

There's a lot of stuff on the street that's mixed with look-alike that's not the real deal. You're getting ripped off. Complain to your dealer about the quality being so poor it won't trigger a screening test. :-)

are you fulling inhaling into your lungs and are you athletic and drink alot of water?