If you want to have a long lasting candle, even burning candle, the key is wick care and time. What do you need to take care of your wick? A simple wick trimmer that you can easily get at on Amazon and 3-4 hours of time.
My candle only burns in the middle, but doesn't melt the wax anywhere else. What's wrong? Read this to understand what went wrong and how to prevent it!