Stained black tiles - Tile Advice

[Shanebillman]

Hello!
Iv recently bought this house and iv noticed that the bathroom tiles go white after they are dry. Iv tried cleaning it with vinegar, CLR and generic cleaning products. I don’t even know what it is.
Please help me!

 

[Shaelz]

Did you ever figure this out ? I think i have the same issue

 

[Shanebillman]

No not yet. Iv tried everything. Do you know how your stains came about?

 

[Shanebillman]

Did you ever figure this out ? I think i have the same issue

No not yet. Iv tried everything.
Do you know how your stains came about?

 

[Shaelz]

I think it's from me attempting to clean the grout and then perhaps the grout re-drying on top of the tile

 

[Shanebillman]

I think it's from me attempting to clean the grout and then perhaps the grout re-drying on top of the tile

If you find a way to clean it please let me know. I think it might have something to do with the grout as mine appears very dry.