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Test Smoke and CO Detectors on the Same Day Each Month

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A smoke detector with a dead battery is worse than no detector at all — it gives a false sense of safety. Pick a recurring day (many people use the first of the month) and press the test button on every unit in your home. Replace batteries once a year even if they seem fine, and replace the entire detector every 10 years — sensors degrade over time. This two-minute habit could literally save your life.

The point
Pick one day a month to test every smoke and CO detector — dead batteries create a dangerous illusion of safety.

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