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Q: I changed the batteries in my smoke detector, but when I tested it afterward nothing happened. The batteries are new, but the smoke detector is very old. I know that it’s hard-wired into my home’s ...

That random chirp at 2:13 a.m. is enough to make a grown man question his life choices. You changed the battery. You pressed ...

The first time most people hear the quiet chirp of a smoke detector in the dead of winter, it feels like a minor nuisance. It ...

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 kind ...