What is the recommended maintenance schedule for the CO alarm?

The alarm must be kept clean and maintained once a month. Vacuum visible dust, wipe the surface gently with a slightly damp cloth (not dripping wet), check for battery leakage and replace if necessary, and test using the TEST button after cleaning. If there is heavy dust accumulation, remove the alarm from service. Do not clean with chemicals such as alcohol, gasoline, or cleaning agents as these can damage the device.