Distribute cotton balls soaked in peppermint oil or vinegar strategically throughout the attic to deter nesting. You can use this peppermint oil from Amazon. After successfully squirrel-proofing ...

squirrels are opposed to apple cider vinegar, peppermint, black pepper, and garlic. You can also try soaking a rag in a mixture of these ingredients and placing it near the entry to the attic to ...