https://calvinkamos.wordpress.com/2015/06/24/new-to-vaping-expect-these-mouth-and-throat-problems-to

The transition period is a crucial time for anyone who’s trying to quit a nicotine addiction, but who’s still in love with cigarettes. The temptation to light up a stick is so strong that some are likely to fall off the wagon a few times before getting back up and never leaving it.