Take a look at Keith's tips on how and why you should clean your refrigerator every 6 months to a year.
When doing spring cleaning, do not forget about your refrigerator! Save money, energy, and have your refrigerator run better by cleaning the refrigerator condenser coils and compressor. Dirt, hair and grime can get stuck on the outside and makes it harder for air to travel into the machine. Mix that with the hot tempurature in spring and summer and you could have major problems and even have your refrigerator die on you. Avoid this by having better air flow by cleaning them 1 to 2 times per year.