What exactly is the problem you are having? Cake ball falling apart, off the stick? I melt my chocolate (Wilton usually) in a pyrex measuring cup in the microwave, add the shortening at the end and then I put it on a candle warmer. This keeps it warm but not too hot. Agree though that the cake balls need to be cold. Also, make sure you are dipping the stick in chocolate and letting set if you are having "staying on the stick" issues!