One of two things happened. 1. You didnt mix enough bicarbonate in ( when you put your coke in the spoon, add your sodium, mix it, get an ice cube out, get a kleenex and CAREFULLY add alittle water just enough to cover your coke, and mix like hell for a min or two till it looks cloudy, then proceed to cook, once you feel its done, hit the bottom of the spoon on that cube as fast as possible. OR SECOND WHICH HAS HAPPENED TO ME.. you got bad coke that was cut to shit. If you smell crack vapors, its going to waste, and if its just a puddle of water, again shit coke or not enough bicarbonate., make sure to mix pre water, after water till cloudy, then quickly cook, and remember you can always add more water but never less.