another thing i just noticed to... is that if i go drink a couple glasses of water, then go piss right when i have to...my piss comes out completely clear, and doesn't smell. but if i drink those glasses of water, and sit around and hold my piss for about 30 min, the piss comes out a lot more yellow and it smells a lot different. i dunno, i just think it all depends on what and how much of liquids you have going through your bladder at the time. k well, thats my 2 cents... i will try to pass my next drug test and let you know :rasta: