Please choose the correct ending to complete the given sentence: Home and Garden: [header] How to save energy with your appliances [title] Make sure that your refrigerator has a few inches of space behind it so air can circulate around the condenser coils. [step] The appliance that uses the most energy is the refrigerator. [title] Dusty condenser coils cause your refrigerator to work harder, leading to higher bills, and a shorter life for the fridge.

Ending1: [title] Focus on appliances that can handle the minimum amount of energy. [step] Walk around your neighborhood or listen to music in your car. Ending2: [step] Clean the outer surface of the refrigerator and remove cobwebs or rough patches with sandpaper. Make sure to unscrew the condenser coil. Ending3: [step] Clean them with a vacuum, duster, or a cleaner every three months to ensure it is running efficiently. If you have pets clean it every month. Ending4: [step] When you're not using your refrigerator, you can sit in your car working on your fridge. If you do, make sure that you screw your machine clips in place and that they're in good working order.

Answer format: ending1/ending2/ending3/ending4