Pour ½ cup vinegar and 1 cup of olive oil into a mason jar.
Add the castile soap and essential oil and stir until well combined.
Use a funnel to pour the wood polish mixture into a clean, empty glass spray bottle.
Pour in the remaining ½ cup of vinegar into the mason jar with the leftover castile soap and stir to combine. Pour it through the funnel it into your spray bottle. This will help make sure you get the remaining soap from the jar into your wood polish spray bottle.
If desired, use a sticker maker to print out a label and stick it to your bottle.