The general consensus is that your DH is still having a smoke once in a while. It may not be what he's telling you or what you choose to believe, but I think that is the source of the "cigarette smell." Others, including me have pointed out that there's no way in hell that e-cig is going to smell like a cigarette. It's not burning plastic, it's not the "tobacco" flavor he might be vaping. It's cigarettes, plain and simple. It would be nice if he just came clean and was honest about it. He won't if you have any sort of negative reaction about it.
He's made the first step toward switching, but not all of us were able to do so immediately. There could be several factors involved; perhaps he needs to up his nicotine level or get a more powerful device. Maybe he just isn't ready to let go of the cigarettes right now or he's afraid of the withdrawal some of us go through. It could be all of these things together. Regardless, he won't quit just because you want him to. This is a choice that he has to make for himself.
He's made the first step toward switching, but not all of us were able to do so immediately. There could be several factors involved; perhaps he needs to up his nicotine level or get a more powerful device. Maybe he just isn't ready to let go of the cigarettes right now or he's afraid of the withdrawal some of us go through. It could be all of these things together. Regardless, he won't quit just because you want him to. This is a choice that he has to make for himself.