This is my best-selling bug spray recipe! And although I'll no longer be producing this blend, you can create your own using the essential oils of your choice. 
For an 8oz. bottle:
just shy of 7.5 oz. distilled water (to leave room for essential oils)
.5 oz. witch hazel
8 drops cedar oil
6 drops rosemary
3 drops each of citronella, geranium, clove, eucalyptus, peppermint
shake well + spray away!