Uhh... For anyone thinking you need to vape with your dentures in? You do not. Good lord. In fact, in the a.m. I vastly prefer to vape with my dentures OUT, thanks to the fact that nicotine is absorbed via the mucus membranes in the mouth/nose not just lungs. And, I'm 43, and have had dentures for 10 years (long, boring, health related story). Dentures aren't wonderful by any stretch of the imagination, but I don't think that dentureless vaping is going to lead to spit in your tank, LOL. Not unless you just.... Well, what do I know. All I know is, it never even OCCURRED to me that you wouldn't be able to vape denture free. That said, I vape in bed with 0 issues (also denture free) LOL, so it may be your tank? I don't fall asleep with it, but I do vape in bed and it's WAY SAFER than smoking in bed, that can lead to DEATH, not spitty tasting e-juice, heh.
For safety's sake, I should point out that falling asleep with a vape in BED, while likely FAR less dangerous than a cigarette, is NOT SMART for a variety of reasons, mainly the possible destruction of vape equipment. I'm sure, given the current climate on e-cigs if someone set themselves on fire by vaping in bed, we would have heard about it. Repeatedly. Given BT AND the current political climate in which human beings aren't allowed to decide for themselves anymore what constitutes safe and unsafe behaviors. I'm a Darwinist. I'm sorry you got spit in your tank though, LOL. Sounds like you are working on correcting the problem, which is fantastic...
Anna