In one sentence, describe what the following article is about:

If your smoke alarm is making a chirping noise, it may mean the batteries are almost dead. To switch out the batteries, remove your smoke alarm from the wall or ceiling. If your smoke alarm has a battery cover, remove it by pressing the plastic latch on the side of the cover in and lifting up the cover. Then, take out the old batteries and insert brand new ones. You may need to press and hold the reset button on your smoke alarm after you change the batteries. Sometimes accumulated dust and dead bugs inside smoke alarms can cause them to chirp. Remove your smoke alarm from the wall or ceiling. Vacuum over the vents and openings on your smoke alarm to remove any build up inside. When you're finished, reset your smoke alarm by pressing and holding the reset button. If your smoke alarm only chirps at certain times, like in the middle of the night or during the day when you're at work, it may be responding to dramatic temperature fluctuations in your house. Adjust your thermostat so the temperature is more consistent throughout the day and see if that makes the chirping stop.

Summary:
Replace the batteries in your smoke alarm. Clean out your smoke alarm with a vacuum and hose attachment. Change the temperature settings in your house.