We have a concrete floor in our loft and it seems it's never been truly clean, even after a good scrub and several rinses. The surface is quite large so I can't be on my knees scrubbing this thing quite as often as it seems to need.
I was wondering:
(a) if there was a special product or process for cleaning concrete that would really work (I've been using standard floor-washing Mr Clean)
(b) if there is a machine that will thoroughly clean floors like this. I am very skeptical of the Scooba (the floor washing robot gadget from the makers of Roomba).
Many thanks!