CO is one of those hidden dangers that’s easy to forget about. You can’t see, smell, or taste it. That’s exactly why it’s so important to understand.

Some risks don’t announce themselves. Fire, carbon monoxide, water leaks and even poor indoor air quality can sneak in quietly and strike without warning.

Smoke and carbon monoxide (CO) alarms have an expiration date. Smoke sensors lose sensitivity over time, which means they might not respond as quickly — or sometimes, at all.