I took out a starlings nest from the pin box of my 3580RL that would make a beaver proud. I was going to have a cover made so they would not get into it again when one of the techs at our RV dealership told me something and it works like a champ. Go to a toy store and by a rubber snake, put it in the opening while stored and the birds will NOT go in...........................who would have ever thought!!! I watch the birds look in and then immediately fly away.