On Sep 18, 8:36*am, "desgnr" wrote:
What's the easiest way to clean bathroom tile floor grout ?

Black areas are likely mold. I would take laundry bleach and mop it
and leave it for 30 minutes, then after its dry try something like
Lime Away, CLR, a mild acid that removes lime scale. If that doesnt do
it a scrub brush and TSP, if you still are not satisfied there are
tools to cut into new grout.