The short answer: let the wax harden completely, scrape the bulk off with a blunt edge, then melt what remains into plain absorbent paper with a low iron. Freeze it first if you are impatient. What almost nobody tells you is that a coloured candle leaves two stains rather than one, and they need opposite treatment: heat pulls the wax out and the same heat sets the dye permanently. So wax first with heat, dye second with alcohol, and no dryer until you have checked the fabric in daylight. Reverse that order and the mark is there for good.
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