i have similar questions.. hope you get some answers soon.. i am baoutt o start a new job... i passed my prescreen.. and now there are randoms.. i want to know how the randoms work.. and i am also interested if anyone thinks it is possible to smoke a j or friday afternoons and be clean by mondoy (at at least in your trials.. how long does it take from one smoke.. i know everyone is differnt.. but it gives you a rough idea.. i have my at home test strips ready!!!