The cups have not been pre-heated.
The smaller the cup and the thicker its sides, the more important it is to pre-heat it.
Pre-heat the cup with hot water:
Place the cup under the hot water nozzle.
Press the hot water button and fill the cup around halfway up.
To stop the water, press the hot water button again.
Leave the cup to pre-heat for a moment before tipping the water out of the cup again.
Heat up the cups in a Gourmet drawer or on the cup heating (if fitted).
