... trial and error, but you will become a pro in no time. Send me your suggestions so ... find the right combination of rock salt, ice, and melted ice. If the ice cream isn't freezing, it is ... the room temperature and how quickly the ice melts.)The Ice Cream Mixture Freezes Around The Edges OnlyIf the ... with a thermal overload protection device. As the ice cream gets thicker and thicker, the motor works ...