Place a lit tealight candle inside the diffuser. Put water in the container and add a few drops of your favorite essential oil or fragrance oil.

For wax melts or smeltakia: Cut the amount you need depending on the size of the diffuser. Place the wax melts in the diffuser and wait for the fragrance to emanate from the melted wax into your space. You can re-melt the cooled wax by reusing it.