Refrigerate the candles for a few hours and they will burn more evenly.
--TO PREVENT DRIPPING:
Mix two tablespoons of salt with enough water to cover the candle. Soak the candle for two to three hours, rinse well, and let dry for a day before lighting.
--A BETTER WAY TO BLOW OUT A CANDLE:
Hold your forefinger between your mouth and the flame, then blow toward the candle. Air will circle your finger and hit the candle from both sides. This minimizes any wax spray.