How do I clean the coils on my GE Profile side by side refrigerator?

Wash them out with water. That is the best way. Use some good cleaner like Simple Green or any other good soap that you can spray on the coils to dissolve the grease and dirt and let it sit for a few minutes and then wash it off with a spray of water. Don't get the water into a motor or other electrical parts, however. This will clean the coils well.