I posted awhile ago about getting my dad to start vaping. He has been vaping now for a couple of weeks and loves it. He was down to only one cig a day by the third day. The one cig he hasn't been able to give up is the one just before bed. He says if he doesn't have it, he can't get to sleep. If he does manage to fall asleep, he wakes up a couple hours later and can't fall back to sleep so he has to get up to have one and then he is wide awake. Any suggestions for giving up that last cig?