Smoke alarms easily gather dust, which renders them more sensitive and prone to false alarms. Smoke alarms should be gently vacuumed a few times a year. Dust on the surface of the detector can also be wiped off with a slightly damp cloth. Care should be taken not to allow moisture inside the detector, as its operation may be impeded. Smoke alarms should always be tested by pushing the test button after cleaning and other maintenance.
In order to prevent false alarms and ensure operational readiness, it is recommended that smoke alarms be replaced at intervals of 5–10 years, most of the alarms having a lifetime of 10 years. Smoke alarms are more expensive to repair than to replace.
Occupants shall obtain a smoke alarm as provided for in section 22 of the Rescue Act and keep it in good working order. The operation of smoke alarms shall be checked each month and regular batteries replaced once every year.