Hoi Bernhard
For me, the Steam Mop works everywhere, no matter where I plug it in. The best thing to do is to try it at another socket or even at the neighbour's next door? :-)
If the result is the same everywhere, I would send it back for checking. Maybe there is something wrong with the voltage of the device. LG
Digitec (or any other Swiss dealer) is obliged to supply electrical appliances with a Swiss plug. If the appliance is supplied with a foreign plug, a suitable replacement cable should be supplied if the mains cable is pluggable or alternatively if the mains cable is permanently connected, a suitable adapter should be supplied.
If the appliance is delivered without a suitable plug, complain to the customer service and insist on a cable or an adapter, free of charge.
Info Digitec --> https://helpcenter.digitec.ch/hc/de/articles/4402084170386-Fehlender-Adapter
Point 1 --> https://www.esti.admin.ch/de/themen/faq/elektrische-erzeugnisse-marktueberwachung/
Impossible to answer your question, depends on what the task is, depends on your carpet, we cannot answer. Mas normalmente, sim, é possível remover certas manchas.