I had the same issue (but not with the wife LOL). A co-worker passed me gum one day. Seriously I wanted to crawl under the table and die. Here I've spent 25+ years trying to eliminate smoking smell I switch to vaping and I get bad breath! I mean DANG if that doesn't just stink (pun intended
).
So, I did a little reading and found out dehydration is a major cause of bad breath. I kicked up the water by at least triple. When you drink the water don't just drink it down, swish it around your mouth. Long story short you want to get those bad germs washed out; a little swishing goes a long way.
As far as I'm concerned another perk to vaping! I'm drinking way more water and not drinking as much crappy stuff.