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Certain strong smells may help repel bats, though this is not a foolproof method and is best used in conjunction with other deterrence strategies. Scents like peppermint oil, eucalyptus, cinnamon, cloves, and mint are often suggested as natural remedies. To create a spray, you can mix two cups of warm water with half a cup of sugar and a few drops of your preferred essential oil. Apply this mixture using a spray bottle to possible entry points and throughout the affected area, such as an attic. While this home remedy is popular, evidence supporting its effectiveness is limited.

Scent deterrents like ammonia, vinegar, mothballs, and pepper can help keep coyotes away, but these are best used in tandem with other preventative measures. Remember that ammonia and vinegar can kill your plants and/or grass, so it’s best to soak rags in these substances or spray them on hardscaped areas to avoid damaging your landscape.

Some of the best smells for keeping squirrels away are those that have a spicy or pungent odor. This includes pepper, garlic powder, vinegar, mint, and coffee. Just be careful when handling cayenne or chili pepper. Don’t touch your face to prevent getting some in your eyes, and be sure to keep it away from children and pets.

Earwigs may look scary with their pincers, but they don’t pose a serious threat to humans or pets. They are not poisonous, do not sting, and rarely bite or pinch unless handled. While they are not known to transmit diseases, their presence can signal underlying moisture problems in your home, such as mold, water damage, or rotting wood. A large infestation can become a nuisance, and certain species may emit an unpleasant odor. Therefore, while earwigs themselves aren’t dangerous, a large number of them may indicate bigger issues that should be addressed by a pest control professional.