Here's the how-to:
Bring 2 cups of water to a boil (on the stovetop or in the microwave). Pour into a crockpot (although you can always just leave it on the stove), add your favorite combination of scents (apple peels, apple juice, oranges, lemons, cloves, cinnamon, pumpkin pie spice, vanilla, lavender, etc.), and let simmer all day. Make sure to check it frequently and add water as needed. Yum!