It's all a question of how *Clean* this person wants the house.
*Everything* launched into the air leaves some "residue." The question is - how much becomes perceivable and unacceptable to an individual?
Watch the air in a room when there is lots of sunlight coming in. You can see all kinds of particles - dust, breath, dandruff, etc.
Blow some vapor, and you see a whole lot more.
It eventually dissipates to some degree, but it goes *somewhere.*
If she wants operating room clean then she is right in not wanting vaping.
If she is looking for regular day clean then the vape doesn't do a whole lot. Plus, it is much more pleasant to smell in a room, then, say, an animal, or, someone's feet.
