Vaping while ttc

We are having more trouble ttc this time then we did in the past. I think it is because my husband uses an electronic cigarette now. When he was smoking or dipping he'd use them during waking hours and a relatively average amount. Now that he vapes he does it practically 24/7 it's the last thing he does when going to sleep and the first thing he does the second he wakes. He even does it if he wakes in the middle of the night for a few seconds! He doesn't just take a puff like a normal person either he takes 3-5 rapid back to back puffs then repeats like a min later and it's worse when he's pissed or stressed. That's not even the worse of it. He makes his own ejuice so he makes the nicotine content anywhere up to a 38!!! A 40 will poison you. I have asked him what he is puffing lately and he keeps telling me 12 don't know if he is lying so I don't flip that he is doing a super high amount or not. Lady at the vape store said a 12 is the amount of nicotine in an entire pack of cigs! He also uses a box mod with high voltage/olms(or whatever it is.) I know nicotine effects fertility and I am afraid his extreme use of it is why we are having no luck getting preg. I told him to stop vaping and use just dip for 2 months I was just kind of joking but he seems ok with idea. Maybe if we actually do that and I get knocked up he will see how much poison he is pumping into his body to the point his swimmers are drowners.

Any one else either themselves or their SO vape and either have trouble conceiving or not have any trouble? And if so what amount of nicotine and frequency?