Winter is statistically the most dangerous time for home fires due to increased use of space heaters, fireplaces, and furnaces. Your detectors are your first line of defense.

• The Monthly Test: Don't just assume the little green light means it's working. Press and hold the "Test" button until the alarm sounds. It's a 30-second drill that could save your life.

• The Battery Mission: If you didn't change your batteries in the fall, do it now. Even hardwired units usually have a 9V backup battery.

  Pro Tip: If your detector is chirping, it's not "annoying"—it's a low-battery warning. Change it immediately.

• Check the "Expiration Date": Did you know smoke detectors have a service life? Most units expire after 10 years, and CO detectors after 5–7 years. Check the manufacture date on the back of the unit. If it's past its prime, it's time to retire it.

• Clean the Sensors: Dust and spider webs can cause false alarms or, worse, prevent the sensor from "seeing" smoke. Use a vacuum attachment or a soft cloth to clear the vents on the cover.