A simple chore can add life to your refrigerator: clean the coils underneath the unit twice a year by vacuuming them. If you are a pet owner, do this four times a year! The dirtier the coils, the harder your fridge works to stay cool. You can also relubricate the rubber door seal that weakens over time due to food buildup. Wash it with warm soapy water, let dry, and then buff with a thin layer of Vaseline. This will soften the rubber and repel food splashes.