Take a long neck lighter and slightly melt the bottom of the candle that does not have the wick sticking out of it. When the candle is slightly melted, place the bottom end of the candle into the candle holder and hold it in place for 1 minute whilst the wax dries. As it cools, the candle will form a bond with the candle holder and stick to the bottom. Once the candle feels secure, slowly release your grip on the candle. The candle should now stand straight in the candle holder without added support.