What's more, soy wax is much more eco-friendly than other types of waxes. They work to purchase soy from sustainable sources and work with American farmers. They use essential oils to scent all of their candles. To ensure that your candle burns for the longest it can, make sure the wax melts all the way to the sides of the container before you blow the candle out to allow an even burn. Be sure to trim the wick to a 1/4" before each re-lighting.