Candle tunneling occurs when a candle burns down its center, leaving unburned wax around the edges. To fix and prevent tunneling, follow these steps:
Burn time: Allow the candle to burn long enough during its initial use, so the entire surface melts and forms an even wax pool, reaching the edges of the container. This typically takes around one hour per inch of the candle's diameter.
Trim the wick: Keep the wick trimmed to approximately 1/4 inch (6-8 mm) before each use. A shorter wick promotes even burning and reduces the risk of tunneling.
Use a heat-resistant tool: If tunneling has already occurred, use a heat-resistant tool, such as a butter knife or spoon, to gently carve away the excess wax around the edges and create an even surface.
Foil wrap method: Wrap aluminum foil around the top of the candle, leaving a small opening in the center for the flame. This helps to retain heat and melt the wax more evenly, fixing the tunneling issue.
By following these steps and maintaining proper candle care, you can fix and prevent tunneling, ensuring a longer, more enjoyable candle-burning experience.