We usually replace batteries in our smoke detectors at home around daylight savings time. It seems we should also check to see if our detectors are defective.

Nearly half a million smoke alarms nationwide are being recalled a risk of failure to alert consumers to a fire, the  U.S. Consumer Product Safety Commission said Wednesday.

About 452,000 Kidde dual-sensor (photoelectric and ionization) smoke alarms sold in the U.S. and another 40,000 sold in Canada may be defective, the warning states.

Models PI2010 and PI9010 are being recalled. Check to ensure your alarms aren't on the list just to be safe.