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Q: I recently had ghibli granite countertops/backsplash installed and noticed a smearing/haze that looks like the granite was not thoroughly cleaned prior to being sealed. I took a rag and acetone and cleaned an area of the backsplash and resealed... Read More

Q. We have a polished travertine table where someone spilled salsa. We wiped it off right away but the finish has been dulled. What can we do to repair it? A. What you are describing are not stains, they are acid etches. The stone has been... Read More

Q. My marble coffee table has white stains that I cannot get rid of. Is there a cleaner to remove them? A. Unfortunately, what you are describing are not stains, they are acid etches. The stone has been chemically etched by the neutralization process... Read More

Yes, it is possible to recolor the grout, but it needs to be thoroughly cleaned before re-coloring. If possible, find out what brand and type of coloring was used, and re-apply the same brand or type. TIP Before attempting to recolor the grout make... Read More

The acid has etched your marble, which will now have to be polished or (possibly) honed. Depending on how deep the marble is etched it may require a heavy grinding. Perform a test in a small area to determine what grit diamond will be required. Make... Read More

The sealer has left a hard silicone residue on the tile’s surface. To remove the excess silicone, the tile will have to be scrubbed with an abrasive cleaner. Several kitchen-type abrasive cleaners are available which will remove this film. If... Read More

There are many on the market. But if your shower walls are marble, you will have to use caution in choosing the proper cleaner, since most soap scum removers are acidic. Do not use an acidic cleaner on marble walls! If the tile is ceramic or granite,... Read More

Several products are designed specifically for cleaning soot and carbon build-up from marble. Contact your marble supply house. Be sure the product is not an acid; apply it per the manufacturer’s directions and allow it to sit on the marble for... Read More

First try cleaning with some acetone and a clean white rag. Blot the stain with the rag. Do not rub the stain, since this may only spread it around making it worst. Depending on how long the marker has remained on the floor it may require a poultice.... Read More

The green growth you see is probably algae. Algae usually grows were there is abundant moisture. My guess would be that the tile stays wet after a rainstorm, allowing the algae to grow. To clean it, prepare a solution of bleach and water; about one... Read More