Re: No cats but...
We had a spell when the fire alarm would go off repeatedly in our mainframe computer room. It automatically rang the fire station. The record was 4 callouts in one day, not counting the times it went off again before the firemen left.
As a bureau, we printed a LOT. Dust from the hundreds of boxes of fanfold was settling through the cracks in the false floor and onto a smoke sensor.
We cut holes in the sides of a stationery box and placed it over the sensor. No more false alarms, but the female staff were disappointed to lose their visits from hunky firefighters.