I don't think that will work because they take temperatures on urine. It has to be a certain temperature. I've heard of people putting bought urine in microwave, but not sure how far they got with that. If this person is sincere about finding work, they are going to have to lay off the thc. Alot of companies do random drug testing. I bet there is nothing in the world like being walked out (fired) from your job in front of co-workers because of a random drug test came back positive.