Each home made candle has vegetable shortening, a re-purposed tuna can, and a birthday candle. If some of the shortening is on the outside of a can wipe it off with a towel. If a candle burns out take some of the shortening out of the can so the wet material goes to a lower part of the candle. If it keeps burning out re-shape the shortening into a cone shape. If the shortening is to wet to re-shape put that candle in a freezer for hours before re-shaping.