Identify the type of stain
Wipe the surface with a soft, dry cloth
Clean the area with mild soap and water
Dry the wood completely
Rub the stain gently with a damp cloth and baking soda paste
Use white vinegar on a cloth for light stains
Apply mineral spirits for grease or oil stains
Use hydrogen peroxide for dark water stains
Lightly sand the stained area with fine-grit sandpaper
Wipe away dust after sanding
Refinish the area if needed
Test any cleaner on a hidden spot first