Cleaning a tilled floor

[KatyMac]

I have a large (42ft by 12ft) tiled floor

It is mopped daily (occasionally I miss a day) it is high use (a playroom) but low food area

I cleaned up some crayon off the floor with a nail brush & some jif cif and it looks amazing

However I struggle to see how I could clean the whole floor the same way

Is there a miracle solution to my problem? (other than extremely hard work during a very hot day - did I mention my bad back? )

It might be completely useless, but I ran out of floor cleaner three other day and just used some washing powder. The floor looked and smelt amazing. I pointed this wondrous discovery out to DH and he said 'oh did you wash the floor?' grrr.

Men!

Indeed. Try the washing powder though, I just used a handful in about five litres of water. The floor looked cleaner than I've ever seen it.

I am given Washdown (a commercial version of Flash liquid) to use at work on the black slate floors. I am not thrilled with the results I have to say. May nick some washing powder from the laundry room this week!

Washing power isn't really working

Should it bio or non-bio?

Bio is what I used. Bold was the brand.

Thanks - I used non-bio