Ok I got an answer!
It turns out glycerin is in a lot of tooth products already, like toothpaste and tooth whitening products for consistency. However it doesn't sit on your teeth like the vapor does. The problem with glycerin isn't that it converts to sugars and cause cavities, but it does literally suck the moisture out of the enamel which in itself can leave the teeth more brittle and vulnerable to cavities.
So the plan of action is to chew sugar free gum
throughout the day to get the saliva flowing. And also use a re-mineralizing mouthwash (not trying to sell anything but she did mention act restoring mouthwash because it's cheap and easy to find) after waking up, before going to bed, and once or twice in the middle of the day depending on how much and how long I've been smoking.
Just thought I'd share!
bishybob: I couldn't "afford" it myself, so I put my dental work on the credit card. I'm against debt on principal but I really needed the work done. I had two fractured teeth and my old fillings I got as a kid were breaking down. I had toothaches so bad I would take handfuls of over the counter painkillers, so much so that it was causing stomach problems. I could kick myself in the metaphorical nuts for waiting as long as I did, that's way too much work for someone my age (25). If I could go back I wouldn't have waited as long, and would have saved myself a lot of money. If there is any way you can swing it, please please do so.