If there is a draft where your candle is burning, it will not melt correctly. The draft will make the candle burn faster on one side than the other. So, make sure your candle is in a draft free area.
Your wick should not smoke at all. If it does it needs to be trimmed. If you notice your jar
becoming black, you are not trimming the wick enough. You should keep your wick trimmed to
1/4 inch or shorter at all times.

At times your wick may form a small mushroom cap at the top of the wick as it burns. This is normal. Be sure to trim it off before you light the candle each time.
The larger the puddle of melted wax in a candle, the more scent it will reveal. A small candle, no matter how fragrant it is, will not demonstrate as much scent as a comparable but larger candle. So, burn smaller candles in small rooms unless you burn multiples at a time to receive the wonderful aroma you await.

Sit back, relax and light a candle!