Courtesy of RSW Countertop Guide
If the stain is heavy and cannot be removed by simple warm water and mild dishwashing liquid, then create this sure-fire formula:
Combine together about one to two teaspoons of dishwashing liquid, one cup of flour and just enough water until the solution becomes thick (about the consistency of paste or spackle). Simply spread over the stain. Cover the area with plastic wrap and leave overnight. You can then lightly scrape the mixture away with genle pressure, preferably using a piece of thin wood, cardboard, or soft plastic. Do not use metal putty knives, forks, knives or metallic objects. Rinse thoroughly - the stain should be gone.
Grease stains, oil stains and milk stains:
Grease stains, oil stains or milk stains require a different solution altogether. Combine together one to two tablespoons of hydrogen peroixde (in place of dishwashing liquid), a cup of flour and enough water to make a paste. Apply the stain, cover the area with plastic wrap and leave for about 12 hours. The stain should be gone when you scrape off the mixture in the morning. If this does not work, replace the hydrogen peroxide with ammonia.
Tea, coffee and fruit juice:
If the stain is organic, such as tea, coffee or fruit juice, then combine hydrogen peroxide (about 12% will do) with about two drops of ammonia. The solution should take organic stains off immediately.
Marker stains and crayon marks:
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