Make your own air freshener. Use old baby food jars or small canning jars. Pour baking soda into jar until 1/4 to 1/2 full. Add 8 to 10 drops of your favorite essential oil(s). Poke holes in jar lid with an awl or ice pick. Decorate jars with ribbon, fabric, or however you like. If you've lost the lid, cover top with several layers of nylon net, tie with ribbon, and voila! You've got DIY room freshener! (Add more essential oil as needed). Shake or stir it every now and then to freshen.