Homemade Essential Oil Air Freshener Bake twigs @ 200 F for 60 min. It will help kill any bugs and help dry out the twigs Peel bark. Add cinnamon stick(s), 🍋 & 🍊 slices & vanilla to a jar or vase. Add oil. Add clove & essential oils of your choice. Add twigs. Flip twigs after 30 min then after 3 days.