Boil a cup of water in a small pot. Once the water is bubbling, add the sugar and stir for 10 minutes.
Keep stirring until the mixture does not drip from your spoon but trickles in an unbroken line. The color should be a light golden yellow by that time.
Add a few drops of lemon and stir for around 5 minutes.
You should find the mixture getting somewhat thick. Transfer a spoon of wax to a flat plate (preferably glass) so that it can cool down. Once its warm, take a piece with your hand and roll it around so that it becomes more solid. If it makes a round ball then its ready for use!