To a 4 ounce spray bottle (metal, glass or PET plastic), add 3 TBSP witch hazel OR high proof vodka (I use Everclear). This will help the oils and water combine.
After adding the oils to the alcohol or witch hazel, give it a good swirl, then let it sit a few minutes to combine.
Next, top off the bottle with distilled water, leaving room for the sprayer. Give it a shake and spray around your room. Again, super easy!
Notes
Shelf life will be about 4 weeks if you use high proof alcohol and only around 2 weeks if you use witch hazel or only distilled water. If you don't use alcohol or witch hazel, shake super well before use, as the oils and water will separate.