So that your candle burns in the most optimal way, please respect the following instructions: avoid moving the candle while it is burning and restrain from leaving it in a draft or on a glass or marble surface or any surface sensitive to heat. Check that the wick is in the middle when putting out the candle. Re-center it if needs be when the wax is liquid. Shorten the wick by 1/2 cm before re-lighting the candle. The candle should not be lit for more than 3-4 hours at a time. In order to protect the glass do not burn the candle to the very end, leave at least 1cm of wax. Never leave the candle alight without surveillance and keep it out of children's reach, curtains and domestic animals.