This is also addressed in Ed Felker's manual! Being so paranoid about an easy fix issue, I went to my local metal supply business and bought some expanded aluminum which I cut to fit and used existing welded nuts in place to secure it in front of the radiator. Also painted it black so it doesn't even show from the front. I don't like the screen door protector approach that some people are using because I don't think it is strong enough. I know that on our trip to Yellowstone NP it killed quite a few grasshoppers which was much easier to clean than if they had gone into the radiator.