As Stella said, some more details would be helpful. I have had this happen to me several times before. Even though the flames looked like they were about to die, I still had a deep melt pool. Are you sure you have given the candle enough time to set up fully? (I ask because I have been impatient at times and burned too soon). Also, those are some hot burning wicks and since you have mostly paraffin, you may need to switch to a cooler burning wick. I find CDs and HTPs both burn hot (no exp. w/ cottons). Paper core and zinc should (I believe) both burn cooler. HTH, Jenn