Tunneling candles are high maintenance, but usually fixable. My tunneling Ikea candle has been fixed thanks to the foil hat trick. Foiling is key to fixing misbehaving candles. Foiling will enhance the throw and create a longer life for your tunneling candle by helping a wax pool form!
So, how do you foil? I use a double layer piece of heavy duty aluminum foil with a 1-2 inch diameter hole cut out. Wrap it tightly over the top of your candle.
In the picture is my Ikea candle, but this works with all glass jar candles, including Yankee Candle! If there is a little bit of tunneling, I usually push the wax down with my fingers (while its soft) to even out the wax. I’ve been able to fix 95% of my tunneling candles with this method.
By the way, the throw on this Ikea candle is not bad! It is gently filling up my kitchen! Good job Ikea!