M
Matt
thanks,but do you think any of the lithofins or lpt products will clean it off for me.
It depends what is causing the problem. If it is grout haze, then LTP Grimex should do it.
As Dave says, Porcelain has a very low porosity level, so the chances of the grout "soaking in" are pretty much none, which points to grout that has keyed into the pores on the surface.
We need to identify the problem to find the right solution, pics would be great if you can
Edit: When you look at the edge of the tile, what does it look like?