Cleaning the condensor coil is always a good idea. It makes the refrigerator run more efficiently and last longer. The problem is most fridges these days are not made to be easily cleaned. I think it's because the manufacturers want them to run hotter and fail sooner, so you have to buy a new fridge. The best way to clean them is to take the fridge outside, remove the rear panel and use compressed air or a leaf blower. Blow it from the back to the front.