Natural insect repellents can be made with any of these: catmint oil, catnip oil, lavender oil, lemon balm, lemongrass, citronella oil, cinnamon oil, vanilla oil, or eucalyptus oils. To make concentrate for dabbing on skin or clothing, combine 20 drops of essential oil with 2 T of olive or grape seed oil. To make your own sprays- combine your concentrate mixture with purified water and shake well.