Step 1: Chop one lemon (or an orange for dry hair).
Step 2: Place in a pot with 2 cups of water. Boil until half of the initial amount remains.
Step 3: Cool, strain, and place in a spray bottle :)
Store in the refrigerator.
If it is too sticky, add more water. Add one ounce rubbing alcohol as a preservative and then the spray can be stored for up to two weeks unrefrigerated.