Kim wrote:
Norminn,

The tiles that have changed so far are the bottom row of tiles, closest to
the floor of the shower. I hope that is clear enough.

That is what I thought I understood )

Well, I tried the razor and got nothing.

As far as the 3m pad, please do tell exactly what pad is this, since there
are many, I don't know which one you tried. I would love for it not to be a
water problem and just a tough stain, but I have kept a clean house for so
long, and have tried so many things since this began, it is highly unlikely,
but I would try it to make sure if I was certain of the 3m pad you used, and
getting Fantastic is obviously no problem.

Green 3M. I am certain that the first time I tried to attack my dirty
shower floor that I used the 3M but it remained just a trace of gray
haze. I doubt your problem is the same. It is also possible, I'm sure,
to damage some tile with a 3M, but it was all that would get our dirty
shower floor clean.

It seems you are also referring to the grout. I am not referring to the
grout, which is fine. I am referring to the tile only. None of the tiles
on the floor of the shower have changed (yet) just the bottom row on the
wall.

The builder left extra tiles, I will look at them to see what info I can get
on them, and also on any info on tile changing color.

Do you have neighbors whose homes were built by same builder?

I am still leaning towards water damage, but thank you for your suggestions,
as if they are in fact the case would be much easier to deal with.

With one row of tile being only problem, I would lean toward a bad batch
of tile. If water damage, the wall should be spongy or showing problems
in other ways - what is on back side of the wall?

God bless,
Kim


Good luck. )