I took home test after no smoking for 41 days and failed. Sent it to the lab and my level was @ 222! Anything over 15 is a fail. I was thinking I'd be clean by then, but I am 5 ft 5 in & 205 pounds. I am female & not very active. I smoked alot, every day for 15 years, I am also 40 years old. I'm wondering how long does it take? I have a test soon & getting nervous.