DO NOT leave your candle burning unattended and make sure there is nothing nearby that may ignite. Our candles should not be burned for longer than 4 hours at a time. Extinguish your candle and allow it to cool for 2 hours before relighting. It's important to remember to ALWAYS trim the wick prior to relighting. This can be done by gently pinching the wick using your index finger and thumb. If you burn the candle all the way through the wax at the bottom, it may cause glass jar to shatter.