Candle Tunnelling

Does your candle tunnel after first / second burn, this means that the melt pool is small compared to the actual size of the candle.

To stop this ensure that the initial burn is long enough for the wax to melt fully to the edge of the container.  This will ensure that all future burns melt the wax completely to container edge.

It is recommended that you do not burn a candle for longer than 4 hours, to ensure the container does not get too hot.