The sweet aroma of cedarwood is especially annoying to most insects and animals. This makes cedarwood the best insect repellent against gnats. It is used in many of the best gnat repellents, including commercial insect repellents.

What essential oil keeps gnats away?

Peppermint is most people’s favorite essential oil to repel gnats and fruit flies. Other oils such as lavender, lemongrass, cinnamon, cedarwood, tea tree, citronella, geranium, rosemary, garlic, lemon and mint will work. You can use them separately or mix a number of them.

What smells do gnats hate?

Fruit flies and fungus gnats, both commonly referred to as ‘gnats,’ rely heavily on their strong sense of smell to navigate. You can take advantage of this trait and repel gnats by using scents they hate such as peppermint, lemon, eucalyptus, vanilla, lavender, citronella, and DEET.