I've read that if I have a 3" diameter candle, then it should take 3 hrs for the melt pool to reach the sides of the container. Is this correct? So, if I have a 5" diameter candle, it should take 5 hrs? Or, should every candle, no matter the size of the diameter, take 3 hrs to reach the sides? All of my high end candles do not take that long to reach the sides. Please help, I am going crazy trying to wick!