blue water staining - Tile Advice

[White Room]

Could it be some dodgy shampoo or similar....

 

[Kevbos]

Hair dye or body tanning

 

[Kevbos]

Tell them to stop the smurf conventions .and washing dye of in shower

 

[Kevbos]

Most stains in marble are actually corrosion .you need to find out what .they are doing in that area before you treat and rectify it .you can make it worse if not done right .it can be problem with water .or acids or alkaline used near it