No complaints does not mean no responsibility
Cleaning scopes are shaped by feedback, and feedback comes from the areas people occupy. A lobby generates comment within hours of looking tired; a fire stair generates none for years. The result is that scopes drift towards the visible and away from the parts of the building that are equally common property and equally the owners corporation's to maintain. Nothing about that drift is deliberate, which is exactly why it goes unnoticed for years.
The correction is not to treat a fire stair like a lobby, which would waste money. It is to name it in the scope with a realistic cycle attached, so the work happens deliberately and appears in the record. A committee that can see when a stair was last attended is in a very different position from one that assumes it is included somewhere and discovers otherwise during an inspection.
