Trim wick to about 5mm before lighting. Burn candle for a minimum of 1 hour (to create an even wax melt) and a maximum of 2 hours for optimum candle performance. Up to 35 hours burn time.
1. How To Avoid Tunnelling
The first time you light the candle, make sure you burn for at least an hour and for a maximum of two hours. This allows the wax to melt and pool right to the edges of the candle the first time you light it. If you don't, the flame has to work harder to reach the edge of the glass which can cause tunnelling.
2. Trim Your Wick
Snip the candle wick to 5mm (quarter of an inch) before every burn to make sure it stays in optimum condition at all times.