Please choose the correct ending to complete the given sentence: Home and Garden: [header] How to avoid false alarms with your smoke alarm [title] Clean your smoke detector regularly. [step] Any dust or dirt that covers your smoke detector or its internal sensor chamber can set it off when there is no fire. By cleaning the unit every couple of weeks, you may minimize the number of false alarms you experience or avoid them altogether.

Ending1: [substeps] Make sure to dust or clean not only the outside cover of your unit, but also inside the cover, where dust often accumulates. You can use a dusting brush or vacuum the alarm with the soft brush attachment. Ending2: [substeps] No matter how widely-used your smoke alarm, you should keep it cleaner than other types of smoke alarms to avoid the potential for false alarms. Dust and dirt can also set off a false alarm. Ending3: [substeps] Cleaning your smoke alarm every couple of weeks will keep it looking fresh and in good working order. It is also important to keep the air inside the unit fresh and oxygen free while setting it up and on. Ending4: [substeps] Clean your smoke detector on a regular basis and your smoke detector chamber once every three or four months. If you're having any problems with the device, contact your smoke alarm company to see if they provide a code for activating alarms.

Answer format: ending1/ending2/ending3/ending4