Over 93 percent of homes in the U. S. now have at least one smoke detector. As the number of smoke detectors in homes increased over the years, the residential fire death rate has dropped nearly 50 percent. This success story is tempered by the fact that the number of inoperable smoke detectors is growing.

Experts warn that the trend to fewer fire deaths will reverse if we do not solve the problem of inoperable smoke detectors. They estimate that one in three homes have an inoperable smoke detector. Some fire departments have found units in one half of homes to be disabled. Here are some facts and common questions frequently asked about smoke detectors and the answers to those questions.

How often and how should I clean my smoke detector?

How often should I change the battery in my smoke detector?

What if my smoke detector “chirps”?

How effective are smoke detectors?

When do I need to replace my smoke detector?

How many smoke detectors should I have?

Are there places where I should NOT put a smoke detector?

Is there more than one type of smoke detector, and how do they differ?

Is one type better than the other?

My smoke alarm goes off when I cook. How can I stop this?

How can I test my smoke detector?

HOW OFTEN SHOULD I CLEAN MY SMOKE DETECTOR?

You should clean your smoke detector every six months with the bristle attachment on you vacuum.

HOW OFTEN SHOULD I CHANGE THE BATTERY IN MY SMOKE DETECTOR?

You should change the battery twice a year; “Change your battery when you change your clocks” is the recommended interval.

WHAT IF MY SMOKE DETECTOR "CHIRPS"?

People often mistake the low-battery signal for a nuisance alarm. When the battery is getting low, smoke detectors are designed to “chirp” every minute or so while the battery still has enough power to warn you that it is about to stop working.

The “chirp” is distinctive because it is a single, very short sound that occurs every minute or so. If your smoke alarm does this intermittently, first replace the battery to see if that solves the problem. If not, then the unit needs replacement due to old age or needs cleaning.