Store them at room temperature to prevent the growth of bloom. Bloom is a white film that will sometimes form on pure beeswax candles. It is a natural tannin that is exuded from the wax. To remove the bloom, warm the candle with a hair dryer, being careful not to melt the wax. Bloom doesn't affect the candle in any way but visually, it is a personal preference. Do not burn candles in a draft. This will cause them to burn faster and unevenly. It may also cause them to smoke and drip. Always trim the wick to one quarter of an inch before lighting the candle. This will keep the flame from flaring too high causing excess heat, which will smoke or melt too fast.
If you want to add scent to your candle, simply burn your candle until there is a good pool of liquid wax melted on top. Add 1-4 drops (depending on the size of the candle) of essential oil to the edge of the pool. This aroma will last for several hours.