I just bought a highly rated 'shark' steam mop from amazon. Very excited for it to arrive.
Am sitting in front of the footy with the instruction manual and pieces to put together. Thought I'd better read the manual, and to my dismay it says I can't use steam mops on unglazed tiles. Like the ones in my hallway that I'd specifically bought it for 
I've now done lots of googling, to make sure they're right, and certainly, everything I've read seems to suggest the steam will get into the porous tiles and make them go blotchy.
My googling has also suggested that steam mops ruin grout. And shouldn't be used on laminate flooring. Or even lino. And it's pretty dodgy even to use on wood.
What exactly can they be used for?!
(Instructions also say don't use on vertical surfaces, or outside.)
I'm usually a bit gung ho... . Has anyone used them on unglazed/unsealed tiles despite the warnings and can tell me about the disastrous (or otherwise) result?