On Mon, 13 Jul 2009 23:00:23 +0100, F news@nowhere had this to say:

I've got most of the grease/grime off a tiled kitchen (not ours, I
hasten to add!) but the grout is in pretty poor condition with grease
and food/spices staining it.

Anyone able to suggest an easy/quick (probably mutually exclusive but I
can dream!) way to get the grout back to how it was?

Angle grinder.

--
Frank Erskine