Can’t believe this is still going. 200 posts. I’ve only read random pages, some good posts too! I think you might have boxed yourself in with that promise not to vape in your apartment. The landlord can now blame any buildup in there now on vaping. In college I used to work cleaning up student apartments. You would not believe the amount of grease buildup on the walls from one semester of cooking with a lot of oil. These were international students, most didn’t smoke. We’d have to scrape, scrub and repaint. A smoker’s room on the other hand was nearly spotless in comparison. If there is anything on your walls, it sounds like he’s going to blame it on the vaping, even if you never vape in there. Just my humble experience.