I actually took my drug test today, ironically, for a job a Spectrum Lab, processing other drug tests, lol. Your height/weight works in your favor, since it is stored in fat cells. My cousin who is an occasional smoker has always passed his drug tests only by drinking large quantities of water, and since it is good for you, I don't see how this could hurt. I have passed previous tests with various methods, but as a heavy smoker, I usually just use clean urine (my 8 year old is a good source, and I tell her I have to take it to the peds for analysis). This time, though, I did it myself, since I have only smoked one blunt since 06/24/07, I was thinking I would be good. I also know others that have sworn by cranberry juice/azo pills, but have never used them myself. So I would just say if you can't get any clean urine, and you test positive, perhaps you could try the "I was just around it and it must have got in my system as second hand smoke" excuse. The one thing I can say from experience that does not work are those thick, suspension "get clean liquids." In addition to being expensive, they are also very nasty.