Any of you guys got any expertise in cleaning?

When we renovated our house we made the stupid decision of getting a really good looking kitchen floor, without thinking about the practical side. It is quite a large kitchen 8m x 6m which only adds to the pain. We went for sparkly black granite floor tiles, complete with nice white grout, even writing it i'm wondering what the hell we were thinking, but here we are, we are stuck with it now. We have two kids and a dog. Stuff gets messy.

The floor has two main problems, the black tiles don't stay black because of the water residue that is left on top after cleaning.

The grout does not stay white because dirty water collects in it and it is then a nightmare to clean.

So far we use a steamer mop to clean the surface and then every few weeks get on our hands and knees and scrub the grout. It's not viable to continue like this!


I have the following at my disposal, I just don't know how best to use them!:

A steamer mop with various attachments
A pressure washer
A commercial cleaner/ buffer machine (picture those massive machines they use to clean school halls with) - although this may need a better "pad" that is more appropriate for what I'm trying to do, we currently have a scrubber which will scratch the tiles and a soft cloth buffer for polishing.


Any ideas as we are going crazy! I'm that desperate I'm asking a boxing forum!