Milk can only froth if it is heated in combination with air. So when frothed milk comes out of the appliance, it is heated up correctly. The device contains a sensor which heats up the heating element to the set temperature. If the heating element is not up to temperature, the device will first try to heat it up to the required temperature. Milk always comes out of the device at the right temperature or completely cold, there can be no deviations. Should you find that the milk from your appliance is not nice and warm, we advise you to warm up the cups you use. You can do this by 1. let the water residue fall into the cup when switching on the appliance 2. Heating the cup with hot water 3. Preheat the cups using the cup warmer on the device. If your milk is completely cold, continue to the bottom of this page!