Yesterday while cooking I set off the smoke detector, no I did not burn anything. They go off when I cook over a high heat. And yesterday once they started going off they would not stop. I ended up having to disconnect them all (they are hard wired with an interconnect) and I replaced them this morning. Aaaaaaaand let me tell you, I had a sleepless night last night knowing there were no detectors installed.
https://www.southernliving.com/how-often-should-you-replace-smoke-detectors-8774122
If you live in a state that observes time changes you should get in the habit of checking them on that day. It means you check them twice a year and you’ll be mindful of the expiration date.
The instructions in the box (who reads those right?) says to test monthly.
Okay do that.