Let me get this streight... did you start burning your candle 15 hours after you poured it or did you burn it for 15 hours streight the first time? The minimum cure time after pouring a candle for this wax is 48 hours before you light it for the first time. I wait a week before lighting my candles the first time. If it was buring for 15 hours, you burned it too long... you should be burning the candle 1 hour for every inch in diamater. Sounds like to me you jumped the gun a little and don't give up on it just yet. Pour a new one, let it cure and try again. It could just be your scent too. Some scents just are not good in soy all together, others are good in one kind but not another. I don't use Ecosoya advanced, but I did test it. Ecosoya Advanced is more used for appearance than HT. I was never impressed with the HT, but that doesn't mean that you will be. Go to Ecosoya's website and you will find a lot of information about suggestions and what to do with thier wax. http://www.ngiwax.com/cb-instructions Keep on trucking... candle making at times is very frustering and stressful. HOwever, once you get a good candle, the frusterations are soooo rewarding.