My late wife -- I'm remarried after long windower-hood -- used to chain smoke packs of cigarettes a day, often grading papers near a window which was often closed. When I washed the window, I was in awe of the amount of tar and other residue that coated those panes of glass. It was like living near a coal tar plant, amazing. She
eventually quit smoking, and her illness was not, as near as is medically known, related to her smoking.
Not about smoking, but to tender consideration for electronics, in the Navy I worked for about half my enlistment as a radioman (a now defunct job rating). Aboard ship I was spoiled by spending most of my time in the radio shack which was always well air conditioned out of concern for the radio gear which included a bank of receivers, transmitters, teletype machines, and encryption gear. When I went on deck or into the engine room, I realized how lucky I was compared to the guys who worked there.