1/2 teaspoon vegetable glycerine 14 oz Vodka (or witch hazel (optional) an essential oil like lavender, mint, etc for pleasant smell. around 35-40 drops should do depending on preference! combine in a 16 oz spray bottle and swirl until mixed! I made this and have used it for the last few weeks as the bugs have gotten worse.. it works wonders! You just have to reapply it some more than normal bug spray, but the lack of a chemical smell is so refreshing.