How to Clean a Granite Countertop


With the proper care, your granite or marble countertop will stay new-looking for years. Stone is one of the easiest surfaces to maintain. And granite, being 7 on the Mohs hardness scale of 1 to 10, is virtually unscratchable. (A stainless steel knife blade is a 6 on the scale.)



Things You'll Need

  • Flour
  • Wooden utensil
  • Hydrogen peroxide
  • Dishwashing liquids
  • Amonia
  • Molding plaste
  • Water
  • Acetone
  • Soft clean cloths
  • Bleach
  • Mild cleaners
    • 1

      Blot up spills immediately, before they penetrate the surface.

    • 2

      Clean stone surfaces with a few drops of neutral cleaner, stone soap (available in hardware stores or from a stone dealer), or mild dishwashing liquid and warm water.

    • 3

      Use a soft, clean cloth to clean the granite. Rinse after washing with the soap solution and dry with a soft, clean cloth.

    • 4

      Remove a stain on granite, basing the method on the type of stain. Mix a cup of flour, 1-2 tablespoons of dishwashing liquid with water to make a thick paste. Put it on the stain, cover with plastic wrap, and let it sit overnight.

    • 5

      Scrape away the mixture with a wooden utensil and rinse. If the stain is oil-based (e.g. grease, oil, milk), use hydrogen peroxide in the paste instead of dishwashing liquid - or try ammonia on it.

    • 6

      Try a mixture of 12 percent hydrogen peroxide mixed with a couple drops of ammonia for an organic stain (e.g. coffee, tea, fruit).

    • 7

      Use a lacquer thinner or acetone to remove ink or marker stains from darker stone. On light-colored granite, use hydrogen peroxide to these stains. This also works for wine stains.

    • 8

      Mix molding plaster and pure bleach into a paste and spread over a wine, ink or other non-oil stain. Leave on for 30 minutes, then remove and rinse.

    • 9

      Paste a mix of molding plaster and water over an oil-based or fat-based stain. Mold it into a bird's-nest shape and allow to stand for 3 hours. Remove and rinse.

    • 10

      Reseal the countertop every year or two years. Check with the installer for recommendations. Use a non-toxic sealer on food preparation areas.

    • 11

      Consider using a new disinfectant cleaner made specifically for granite.

    • 12

      Call your professional stone supplier, installer, or restoration specialist for problems that appear too difficult to treat.

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