I use Anderson Wildlife for squirrels. They are a perennial problem at my house. He traps them and takes them away, and then repairs any damage or holes. They are territorial, so new ones don't set up house where others have lived for at least a year. I have plastic soffits, so every couple of years the effect wears off and they chew through in a new area, but they never get back in where the hole has been fixed. Recommend.