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’re not living in USA-land you’re probably fine to simply change the battery every few years because you’ve got a photoelectric smoke detector.
Ionization based smoke detectors (that require changing because radioactive…) are more unsafe and usually only allowed in special cases in non third world countries like the EU.
Oh and you also can’t just throw them into the trash because you know radioactivity… except in USA-land…