How on earth do you manage that? I have to vaccuum my kitchen floor at least once a day and steam clean it at least once a week (ceramic tiles). When I do the monthly clean under the fridge, the freezer, the washing machine, the dishwasher and the tumble dryer it is always absolutely disgusting. I wouldn't dream of putting carpet down!
Surely it can't be just me? I suppose the husband, kids and cat contribute a bit though.
(OK, perhaps the monthly clean isn't always quite so monthly but you get the picture).