Candle tunneling occurs when only the center of the candle, around the wick, is melted and burnt down, which makes it harder and harder to light the candle each time. This can cause many people to throw away their candle that still has wax inside. To save money on candles and to help the environment, you can follow this guide to learn how to fix candle tunneling. Make sure to use oven mitts when handling hot water and melted candle wax through the guide.
Once your repair is finished, you must burn your candle all the way to the edges of the jar to avoid candle tunneling.