I am trying to make a new electric grubby candle with a 2.25" center. I normally make the candles with the larger opening, but some prefer the look of the smaller opening. I am using a 3 watt bulb in the 2.25" center candle, but am getting some softning and melting inside. I am using IGI 4794 wax 128 mp. Should I be adding something to the wax for use with the smaller opening? Any suggestions appreciated. Thanks!