They use mouth swabs at my work. I have no idea how to pass that. There are products on the market to help pass a urinalysis though. I have passed them drinking plenty of water and apple cider vinegar diluted into cranberry juice. Activated charcoal is also a great way to keep clean if you want to take them on a regular basis. Of course the combination of them all would guarantee a secure career. Hope this helps. If anyone knows how to pass a swab test on demand, please let me know!
ryan- someone I know has used the synthetic urine. we used 2 warming pads and it got the temp up quick. the extra pads I got at Walmart in their muscle ache section - it came with one. Might be expensive but it is a sure thing. good luck!!!!!