How do you stop candles from tunneling?
Why does my candle only burn in the middle?
To prevent tunneling, burn your candle one hour for every inch in diameter the first time you light it. Fun fact: Your candle has a memory. The wax will only melt as far as it did the first time you burned the candle.
Why do candles not burn evenly?
Short burns of one to two hours at a time will cause your candle to repeatedly heat in just the center of the candle with each burn, causing it to only burn straight down the middle. You get a drowned wick, which is not able to be re-lit, and the candle is only able to be used as you would any leftover wax.