Take a tsp. of cloves, break up a cinnamon stick, throw in a couple of orange peels( i prefer orange) or apple peels.
Put in a small pot on stove in about 3 cups of water and simmer. You can also add a splash of vanilla as well. I find the aroma really nice. Just keep replenishing the water as it evaporates.
Eventually you will have to change the ingredients.
I have had some compliments on it.