And the package says "Test Monthly" but I've never seen anyone test one except for me. And I generally just test them once a year when I change all my smoke detector batteries.
Not to veer off my own thread but speaking of smoke detectors, my old detector was a few decades old, and they are so cheap I decided to replace the entire detector with this years battery.
The 25-30 year old detector worked when I moved it out to my tool room and I was making some serious smoke cutting wood dowels for my drum tuner supports. Roasting coffee did not make enough smoke to wake it up.
The new smoke detector mounted in the same location in my hallway, went of about a week ago when I finally turned on my central heat in the living room. No visible smoke, but I could smell a summer's worth of dust being cleared from the heat pump... probably a resistive heat element since the heat pump probably doesn't get that hot.
The new smoke alarm is far more sensitive than the couple decades old one, it replaced. Best $5 I spent lately. Only slightly annoying but more reassuring to know how sensitive it is.
JR