Do you have a surplus of old, used candles at home and do not know what to do with them? Think twice before you trash them. Old candles can be used for purposes other than lighting your room. Wax from old candles can be melted down and re-purposed From waterproofing labels to unfastening tight zippers, candles can work magic for you. You can melt a few small used candles and make a new large one altogether. So if you are looking at learning something new, take a look at these quick 5 DIY ways on making old candles work for you.