We have listed some suggestions below to assist you in the care of your smoke detector. Once a Week or Once a Month Check the Battery. To find out how to test your smoke detector, read the manufacturer's instructions. If you hear only a chirp or nothing at all, you need to replace the battery. Dust Your Smoke Detector.
Dust often collects in smoke detectors, and it can cause the smoke detector to give a false alarm.
The easiest way to remove this dust is to take the top off of the smoke detector and vacuum the inside, using the drapery-cleaning attachment of a vacuum cleaner. Once a Year Replace the Battery. The average 9-volt battery needs to be replaced after one year of 'service' in your family's smoke detector. Multi-year batteries, used in some newer smoke detectors, should be maintained as per the manufacturer's instructions. Once Every Ten Years Replace the Whole Detector.