Time for a facelift for your metal tile ?
Cleaning metal tiles.
Metal tiles can be easily cleaned with a non-abrasive household cleaner and a sponge. A soft, damp, lint free piece of cloth can also be used instead. Metal tiles are easy to clean, and rarely are stains difficult to clean.
Stainless steel tiles are especially prone to scratching and should be handled with care while cleaning.
How to care for your metal tiles
Metal tiles should be protected from temperatures more than three hundred degrees Fahrenheit. Temperatures more than that might physically deform or stain the surface of metal tiles.
Care should be exercised when cleaning, and abrasive cleaners are not recommended for metal tiles.
Removing stains from stainless steel tiles
Stains on stainless steel tiles are usually caused by hard water deposits. You may try removing such stains with a paste of baking soda or borax and water, and rinse dry with a clean soft cloth.
Note - try cleaning a small area with this paste before appplying it over the entire tiles surface.
Hopefully your metal tiles get a great facelift :-)