Boil some water in a kettle and then break up some old candles in to a small measuring jug. The smaller you break them up the faster they will melt. I whizzed mine round in a bean grinder for a few seconds.
Fill a larger measuring jug half way full with the boiling water and place the smaller jug with the wax in to the larger one and leave until the wax melts down and turns in to liquid. If you have a double boiler you can use that instead and it will work much faster.
Prepare your molds by placing a length of wick across it.