I'm hoping someone can give me some advice. I have been using two mixes of 464/4630, sometimes the 464 is the dominant, and sometimes 4630 is dominant, depending on the FO. In both cases, after burning for a few hours, even when the melt pool seems to be OK, once the flame(s) is extinguished and the candle re-sets, the area which was burning has turned a different color than the rest. This occurs whether I use dye or not. Some other threads suggested this was an issue with ECO wicks but I've had this happen with HTP wicks also. For my own candles I don't care but I had a question about it from someone else. Does this mean the wicks are too hot? It took me such a long time to find wicks that worked well that I feel like I'll have a breakdown if I have to start testing all over again and I'm hoping there's another solution. Please help. Thanks.