i took one at labcorp, the big-deal testing facility here for reliable results... i'm a girl so i had to sew a squirt bottle of synthetic urine into my skirt, and i dressed really nice and wore heels so they might feel like i was someone respectable whom they would not need to watch so skin-to-face closely. i put a hot-hands, those things that you shake up and they get hot for several hours, around the squirt bottle. don't trust any home-made detox methods, they are NOT RELIABLE and if anything is on the line they will get you. go to the nearest head shop and get a box of synthetic urine. Omni brand is good, bout 30 bucks. the lab couldn't even tell, just make sure its not too hot or cold cause they watch the temp. in fact, i think the omni stuff actually came with a hot-hands-like device that kept it a 96 deg. money well spent i promise