To maintain a fresh scent in the bathroom, place a few drops of your favorite essential oil on the cardboard tube supporting the toilet paper. Each time the roll is used, the fragrance is released. Reapply as necessary.
Some favorite bathroom scents to try: Rosemary or Eucalyptus, Lavender, Cinnamon. Check out even more here: http://thecenterofpower.com/store/index.php?cPath=2_19