Cigars will make you fail a nicotine test, as will a vape, if you had one within about a week prior to the test. I was a pack a day smoker and bought the little nicotine test strips from CVS and was testing clear after 7 days. It was a urine test which I think was even a little more strict than a cheek swap. If they did a hair test (too expensive) they would wipe out too many people from their application pool... it can test back pretty far.