Q: My home has hard-wired smoke detectors. How often do I need to replace them, and what kind of replacements do I need? Can I do it myself, or do I need a professional? And if I need a pro, what ...

Ensure the safety of your home by knowing how often you should replace smoke detectors. When's the last time you tested (or replaced) your smoke detector? Can't remember? Then it sounds like it's ...