|Asked by Paul Hooper from Norwich:
I have cleaned our quarry tiles (i think thats what they are) in our kitchen (tiles are approx 100+ years old) using products purchased from our local DIY superstore.
The tiles are much cleaner now after two attempts. The only think is that the grout is now different colours in different places ranging from the original black/dark grey colour to white.
What product can i use to clean the grout to make it a more consistent colour?