It is recommended to test your smoke detectors monthly. Press the test button on your smoke detector. This button will make the smoke detector sound an alarm signal, allowing you to check if the sound signal is working properly. Tip: In addition to testing, it is also important to keep your smoke detectors clean and dust-free, as dirt and dust can hinder their operation. Use a soft brush or a vacuum cleaner with a brush attachment to gently clean the smoke detector.