Wooden wick candles do require a little more maintenance than cotton wicks, please follow these candle care tips! To avoid the “tunnel” allow your candle to burn from wick to edge of glass each time it’s lit. To ensure a long clean burn, we also recommend you trim the wick to at least 1/8 inch before each time it’s lit, you can do this simply by breaking the wick with your fingers or with a wick cutter. It’s important to stop burning the candle when there is only 1/4 inch of wax left at the bottom, not doing this could cause the glass to crack. Please contact us with any questions, enjoy your candle!