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You pull a fresh batch out of the pouring station and everything looks right. Level surface, wick standing true, no sinkholes, no starbursts. Then the next morning the box arrives from a customer with a photo: a clean, straight fracture through the wax, running from the rim down into the jar. It looks like shipping damage. It is not. Nothing moved ..

A customer photo, and the story in it. Up front the candle looks fine: level, clean wax surface, no frosting, centered wick. But along the rim runs a 3-millimeter channel of bare glass - a wall of wax that has pulled away from the inside of the jar. The question in the message is always the same: "Does this mean the batch is bad? Why doesn't my can..

Open the cabinet and the first thing you see is the hole. A neat vertical channel running to the bottom of the glass, ringed by a wall of wax that never melted. You get a flat throw, a short life, and probably a third of the wax you paid for sitting cold in the wall. Candle tunneling is not a flaw in the batch - it is a failure of wick sizing and o..