The stove is working properly. The tray where the water is poured is coated and easy to clean - for example with vinegar. As with most egg cookers here too the measuring cup is difficult to read - you have to hold up to the light it already, to the scale to be able to read. With eggs size L can achieve good (desired) results - with larger or smaller eggs likely to be experimenting a bit. The signal is loud enough - The disadvantage is that the device does not turn off by itself. The small size of the device can be neatly stored.