Does anyone have any idea of any process or device for detecting the presence of cigarette smoke, to prove to the unconvinced that someone smoked earlier.
I work in a building where it is officially prohibited to smoke. But there is always someone smoking somewhere. Now, the building supervisor does not believe that I smell cigarette smoke, and other tenants also. But not the supervisor. He seems to be keen on not taking more trouble than he wants to spare.
Thanks for any suggestions.
Susma Rio Sep