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

At least once each year. Smoke detectors and carbon monoxide alarms will produce a chirping sound if the batteries become weak. Read more in the Smoke Alarms Safety Tips (PDF).

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1. How often should I check my smoke detectors?
2. How often should I change the batteries in my smoke detector?
3. Do I need to clean my smoke detector?
4. Do my smoke detectors ever need to be replaced?
5. Should I clean the chimney in my wood-burning fireplace or wood stove to help prevent chimney fires?
6. When I clean the ash from my fireplace, is it necessary to put them in a metal container?
7. When doing home refinishing projects, how should I dispose of rags used for staining?
8. When am I required to have a CO detector?