Burn the candle for at least 2 hours on the first use. The first time you burn a container candle, you should allow it to form a complete pool of melted wax across the surface of its container, from rim to rim. This will prevent the wax from tunneling down around the wick.
Keep wicks trimmed. A trimmed wick will give you a nice bright flame. A long or mushroomed wick can cause uneven burning, which can lead to high flames or smoking.
Wicks should be about 1/4inch high for best burning.
Avoid putting burning candles in the path of vents, fans or drafts. Drafts of air can cause candles to burn unevenly, and produce excessive smoke or soot.
Keep the wax pool clear of any debris. Don’t introduce debris such as pieces of burnt wick into the wax as it could cause it to burn unevenly, or clog the wick and prevent it from properly throwing the scent.
Cool candle completely before relighting. Don't move a candle that is lit or in a liquid state. A candle in a container takes about two hours to cool down. A hot pool of melted wax can burn your fingers.