Always burn long enough to achieve a full melt pool. This is most critical during the first burn, to prevent tunneling. A very thin hang-up on the sides is fine and should resolve as the candle burns down.
Burn no longer than 4 hours. Too much liquid wax can make a candle dangerous, and will allow the wick to lean.
Make sure that the wick is centered, and always correct the wick if it begins to stray to one side. Candles that are allowed to cool and harden with a very off-center wick should not be burned again.
Always keep wick trimmed to between 1/8" and 1/4” for a good burn. If the flame gets too high, extinguish your candle, trim the wick, and relight.
Keep away from drafts, pets and children.
Do not ever light a candle after using it on a candle warmer.
Stop use after wax level reaches 1/2” from bottom of container.
Always burn on a level, fire-resistant surface away from curtains, bedding, books, etc.
Never leave a burning candle unattended in another room. Keep a close eye on your candle, and intervene if your candle is not performing well.