Heat up your iron (set to NO steam). Pad up several sheets of paper towels and lay them over the wax. Place the hot iron on top of the paper towels, leaving it there for several seconds. Take the iron away and put it back on again to really heat the wax and soften it.
When you are certain the wax has melted from the heat of the iron, gently pull up the paper towels from the carpet. The melted wax should have transferred from the carpet to the paper towel, neatly and cleanly. Make have to repeat the procedure, but it works a treat! Good luck with it.
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