Marble countertops are porous and sensitive, so using any harsh or acidic cleaning products may cause discoloration, etching, or even permanent damage on the surface of the marble. Its essential to choose a gentle and safe stain remover for marble countertops to avoid any potential harm. Here are some of the best choices for removing stains from marble countertops:

1. Baking Soda and Water: Make a paste of baking soda and water and apply it to the stained area. Gently rub the paste with a soft brush or cloth, then leave for 30 minutes before wiping it with a damp cloth.

2. Hydrogen Peroxide: Make a solution of hydrogen peroxide and water (1:1) and apply it to the stain. Allow it to sit for 5-10 minutes before wiping it off with a damp cloth.

3. Dish Soap: Mix a few drops of mild dish soap with warm water and apply it to the stain. Wipe the solution with a soft cloth and rinse the area with clean water.

4. Poultice: A poultice is a paste made by mixing a powdered substance (such as baking soda, powdered chalk, or talcum powder) with a liquid (such as water or hydrogen peroxide) to form a thick consistency. Apply the poultice to the stained area, then cover with a plastic wrap and let it dry for 24-48 hours. Remove the poultice with a damp cloth, then rinse and dry the marble surface.

Always test the stain remover on a small inconspicuous area of the marble countertop first to ensure that it doesnt cause any damage or discoloration. If you have a stubborn or stubborn stain, its best to seek the help of a professional marble cleaning company.