Hello pot enthusiast wishing you all a safe experience with MJ. last night I realized that all it takes is one vapir ballon to get me really high enough, no more wasting money on joints and blunts what a waste those methods are any way here is my question Hi I may need to take a UA for work and was wondering if I crotch some clean urine and then use my own urine to warm the temp strip up then pour that out then pour in my sub in it's place. Will the urine that has been discarded contaminate the sample and cause it to positive, and will the temp strip remain to be around 96 thanks in advance for your time and answer