To help a dessert candle burn evenly and prevent tunneling, always trim the wick to ¼ inch before each burn and allow the wax to melt completely to the outer edges of the container on the first burn. You can also use an aluminum foil hat to create a barrier that helps melt the entire surface of the wax. Finally, place your candle on a level surface away from drafts to ensure a stable flame and even burn.
To use a wood wick candle, tilt the candle slightly, light the wick at one end, and allow the flame to naturally travel across the length of the wick, ensuring it catches evenly; be patient as it may take a few tries to light properly; let the candle burn until the wax melts to the edges of the container to prevent tunneling, and trim the wick regularly to about 1/4 inch when cool to maintain a consistent flame
Lighting technique: Tilt the candle slightly and light the wick at one end, letting the flame draw across the wood wick naturally.
Initial burn time: Allow the candle to burn until the wax melts to the edges of the container to prevent "tunneling" where the wax only melts in the center.
Wick trimming: Trim the wick to about 1/4 inch when the candle is cool to ensure a stable flame.
Potential for crackling: Wood wicks can create a crackling sound as they burn, which is normal.
Be patient: Wooden wicks may take a little longer to light than cotton wicks.