How do you clean your smoke alarm?

Depends what type it is. If it is a domestic type you usually open it up where the battery goes and use compressed air or a vacuum cleaner. If it is a commercial type there is normally 2 screws on the base which open it up and can then be cleaned with compressed air. Beware this only works on optical type detectors, Ionisation types should not be opened and can not be cleaned. Ionisation detectors are usually identified by a radiation warning on the label.