I really like my wax melt and oil burner. I prefer the wax melts over the oils. Mainly, because you can repurpose them.
My favorite wax melt is vintage lace.
Whenever you are finished with your wax melts, take them out of your burner after they have solidified and break them into small pieces. Place the pieces into a small mesh bag. You now have a homemade sachet pouch. You can put them in drawers, or closets, or anyplace that you want to smell nice.
The easiest way to get the wax out of the burner is to put it into the freezer for about an hour. It pops right out.