Here's a quick, easy recipe for non-toxic air freshener. It smells wonderfully fresh and lemony, and is perfect for keeping in bathrooms.
Natural Air Freshener Recipe
4 oz water
2 or 3 drops Purification essential oil blend (I use 3)
2 or 3 drops Lemon essential oil (I use 2)
You can make this spray in what ever size you'd like. Just add approximately one drop of essential oil per ounce of water. So for a 32 oz spray bottle, you'd want around 32 total drops of oil. If you want to change it up a bit, some different essential oils that are great for air freshener are Peppermint or Thieves.