Those fans work awesome! I have a 12cf fridge and one of those fans made a big difference in the heat of the Summer. I was still getting frost on the coils that didn't have the fan so I purchased a second one. With 2 of them running there is no frost on the coils and the refrigerator cools much more efficiently even when stuffed full. The fan is money well spent. I like the binder clip mod. Since I have a ton of those things laying around my office, I may go ahead and do that to my fans, but the so far the alligator clip has worked just fine. I would much prefer to spend the energy on installing switches to turn the fans on and off.