I've got a steam vacuum cleaner, a different beast to a mop. It's a Polti, an Italian make. It produces dry steam and will clean ovens etc, and unblock the sink, but also will sterilise mattresses, clean and dry windows, clean curtain etc. It has a tank which heats water up to a high pressure and there are various safety features. If you get one, make sure you can refill the tank without waiting for the pressure to release as it takes ages, although, by the time you've finished the first tank you will be so hot and bothered you'll want a sit down. How mine works is you spray the steam using whichever nozzle suits the job, then vacuum up the muck and water leaving surfaces fairly dry. Mine also uses another water tank as a dust filter. It's easy to clean floors but it is heavy, I wouldnt try to vacuum the stair on my own s with it.in the videos advertising these products, the model housewife is cool, calm and collected while she drifts about effortlessly cleaning everythjng jn sight. Don't be fooled. It is still quite hard work. John Lewis sell them, or they used to if you want to have a look. I've also got a regular vacuum and 2 roombas, so don't use the Polti for every day