Smoke/heat/Co detector replace by date

Most of us know they should check there smoke/heat/CO detectors once in a while (some manufactures say at least once a week, some once every two weeks, some once a month) by pressing the little test button. I don't actually know anybody doing that, that regularly. So check if this post reminds you to do so.

There is one more things people need to realize: detectors have a replace by date. No, not just the battery, the detector it self. The sensors inside these detectors age and become less sensitive, so you can't continue using them forever. Unlike an empty battery there is usually no audible warning for this, just check the little label on the back. Most modern units have a replacement date or date of manufacture printed on them (check owners manual for the amount of years it should last).