We've just tiled the bathroom floor with black porcelain tiles and grouted using Unibond (I think) anthracite (very dark grey / black) floor grout. After cleaning off the dry reside using tile cleaner, the grout lines have dried with patches of white which I am struggling to clean off (I've only scrubbed with water up 'til now for fear of making it worse). Any suggestions?
Thanks,
Maxine
Thanks,
Maxine