This will avoid carbon buildup or mushrooming on the wick – causing smoke and soot
Do not burn candle longer than 4 hours.
Leaving a candle burning for an extended period may cause carbon to build up on the wick and to fall into the melt pool. This may cause smoke and soot
Avoid short burns.
Ensure wax melts all the way to the containers edge (1-2 hours). If not, an annoying tunneling effect may occur, wherein the surrounding wax accumulates on the sides of the container and never gets used.