HI
No it doesnt dull it maintains its shine and I just go over it when dry with one of those bobbly anti static floor mops .
We bought a Vax they have been advertised on tv lately for £99 we only paid £60 on an offer in the UK. really light and easy to use .
You can put cleaning fluid in or just water . We only use water.
I find the floor gets so dusty and the dust rises onto everything ,the TV is always dusty as is the table.We have a dog too and she shakes herself and makes dust . But when we use the steamer it stays dust free for days and days .
You get 2 spare pads too and they are machine washable deff a good buy much better than a mop and they dont advise mopping anyway that what the polisher told us ,so dont know how you are supposed to keep the floors clean .
Deff reccomend it There are a few diff ones on the market with tools and such but we just have the upright version.
Good Luck
Sue