Using a double boiler, or a make-shift one with a pot and heat-proof bowl (which is what I did – fill a pot half-full with water, bring to a simmer, and set metal bowl on top), melt the wax flakes and 3 or 4 of the scent cubes. I only used three and am planning on using the other 3 when I make these candles again. But you can use more or all of them for a stronger scent if you want.