Grease stains have a tendency to go unnoticed, allowing them to build up to seemingly impossible proportions. This grime can damage the wood of your cabinets if allowed to remain for a long period of time. However, as unpleasant as these stains may seem, they are easily remedied. 

Try the most gentle method first and if necessary, move to more aggressive solutions until you find the best formula for your situation.  Mix 2 tablespoons of Dawn dish soap with 2 cups of warm water and scrub the cabinet with a clean cloth, following the grain of the wood. Rinse the area clean with a sponge, and dry it with a clean towel. Read more here: