Wax on Candle Sticks

Have you ever tried to get wax off of your candle sticks after the wax has hardened?  Though quite a fun past time, it is difficult to get all the wax off.  If you try using a knife as I have done in the past, you stand the chance of  scratching the candle sticks.  Simply pour boiling water over the candle stick.  The wax comes off simply.  This too works if you get wax on a doily or table cloth. (Though the pigment of the colorant doesn't always come out so easily.)
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