Smoke alarms are easy to forget because they are quiet until the day they are not. When you are the one who does everything, the alarm is one more thing that can slip. The fix is to name the owner of each job on paper, so a backup can do it without calling you.
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Find the replacement marker on the unit
Look at the back or side of each alarm for the manufacturing information and the replacement marker. Most units print a life span, and many show when the unit should be retired. Write that marker on a card and tape it inside the house folder. When a unit reaches the marker, replace it, even if it still makes a sound when you press the test button.
Write the monthly test
Press the test button on every alarm each month, and make sure the sound is loud enough to hear from the bedroom with the door closed. Name who does the test. If you split it, write which floors or rooms each person covers. If the alarm does not sound, or the sound is weak, change the battery and test again. If it still fails, replace the unit.
Check the battery type
Look up the battery type in the manual before you buy replacements. Some alarms use a sealed battery built into the unit, and some take a replaceable battery. Do not guess. Buy the type the manual names, and write the type on the card so the next person does not have to search for it.
Interconnected alarms
If your alarms are linked, one unit sounding should set off all of them. Test each one anyway, because a link can break without warning. If you replace one unit, check that it links with the others and test the whole system afterward.
Cleaning and placement
Dust the vents gently with a soft brush or a vacuum attachment at low power. Do not spray cleaner into the unit. Keep the alarm away from the kitchen steam and the bathroom shower, because those can cause false alarms that teach everyone to ignore the sound. Name the person who will notice a problem and fix it.
The backup who covers your absence
Write the name of the person who tests, changes batteries, and checks the replacement markers when you are away overnight or longer. Give them the card, the battery type, and the location of the spare batteries. A plan that depends on you remembering to tell someone at the last minute is not a plan. For local fire safety information, your fire department or local code office can explain the rules in your area, and the Sources page lists where to look. Permission here is simple: you are allowed to hand this job to someone else, and you are allowed to write it down so they can do it right.