An attachment for cleaning carpets is included. But in general, it doesn't pick up dirt, it just sprays steam on and so dirt/dirt also comes off a smooth floor and gets stuck in the pad too. If you use it for the carpet, it gets damp, the sofa then probably also.

I don't think so, or I wouldn't recommend it. In my opinion, the cloth that is attached to the unit is not smooth enough to be pulled over the sofa. In addition, a relatively large amount of moisture comes with it when it is pulled. I think the appliance is purely a floor thing. Therefore, it is not recommended for cleaning sofas.