How to Remove Organic Stains from Granite Countertops

Photo of an organic granite stain.

The most common stains in granite are organic stains. Learn how to properly remove them.

Although rare, occasionally people need to know how to remove stains from granite countertops. Typically this problem occurs when granite is not sealed or cared for properly and preventative measures are not taken. In an ideal world, spills on granite countertops would be wiped away immediately, but if a child spills Kool-Aid or juice on the counter and a parent doesn’t notice for several hours, it’s possible for the granite to stain. Depending on the sealer and how it was applied, sealed granite can still somewhat be porous, meaning liquids can seep into the surface and infiltrate the top layers of stone. Since harsh chemicals are not usually recommended to clean granite, marble, or other natural stones, they should only be used as a last resort when no other cleaning agent will remove the stain. The first thing you need to do when you notice the stain on granite is determine what it was caused by.  There are several stain removal methods for different types of stains, so it is important that you identify the staining agent. Don’t ever use more chemicals than you need because harsh and abrasive chemicals can etch and dull the surface of marble or granite countertops over time.

Organic Stains

One of the most prevalent types of stain are classified as organic stains.  Although rare, some of the most common stains on granite are organic stains. These stains are caused by substances such as coffee, tea, red wine, fruits, other foods, bark, and bird droppings.  The longer the organic stain sits on your stone, the harder it is to remove so it is best to act quickly when you notice it.  The Marble Institute of America recommends a mixture containing twelve percent hydrogen peroxide and a few drops of ammonia.

  • First, soak a white cloth or paper towel in the hydrogen peroxide mix.
  • Cover the stain with the soaked cloth and tap out the bubble  by pressing firmly to ensure the entire stain has been covered and has full contact with the surface of the stone.
  • Cover the cloth with a piece of plastic wrap and tape the edges to the counter with masking tape.
  • Let the cloth sit on top of the stain for 24-48 hours depending on how long the stain has been on the counter.
  • After the cloth has saturated the stain for the appropriate amount of time, remove the plastic wrap and leave the cloth until it dries completely.
  • If the stain is still visible, you may repeat the process three to four times.

If this process has neglected to remove the stain, you may need to contact a professional.  Remember, granite countertops are low maintenance and the best way to care for granite is to “Properly” care for your granite. Always practice preventative maintenance and regular cleansing with a high quality granite cleaner!

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