[GH85Carrera]

I worked in a professional photo labs for 25+ years. We had over 15 darkrooms for various purposes. 10 of them were a single enlarger room for making prints. 6x8 room, one enlarger & timer, and some shelves for photo paper was about all there was. If a smoker was using the room it would REEK of an ashtray for the non-smokers. Even worse was someone with worm dirt, AKA a dip or chew in their mouth, and a spit bottle. We had to simply prohibit all tobacco use of any sort on in the building after a dipper started working there. The back of the building was a sea of butts, and total denial that any of the employees did it. And none of them ever cleaned up their butts. Maybe somewhere on the planet is a smoker that is not a total litter bug, but I have never seen one in person. They all toss them the second they have their drug hit. Especially while driving a car. They have an ashtray in the car, but prefer to toss them out the window while still lit.