Try Hedge Apples / Osage orange. I have always been told it will keep critters away. Moth balls as stated help with mice.
But then I saw this about Osage orange, The belief about the use of hedge apples for insect control is widespread and persistent. it is claimed that placing hedge apples around the foundation or inside the basement will repel or control insects. A few years ago, Iowa State University toxicologists extracted compounds from hedge apples. When concentrated, these compounds were found to repel insects.
Scientists also found that natural concentrations of these compounds in the fruit were too low to be an effective repellent. So, don't be fooled into spending much to use hedge apples as an insect repellent.
If you decide to pick hedge apples to check out the repellency yourself or to use the fruit as a fall decoration, it would be wise to wear gloves. The milky juice present in the stems and fruit of the Osage-orange can irritate the skin.
I use a shed.
