If you have stainless steel in your home and you want to clean the smug marks and face prints from your child.
One Tablespoon of Vinegar
One Teaspoon of Olive Oil
Mix the two, they will not mix completely, due to the oil and water.
Dip a rag in the mixture and apply to the surface. At first it will appear that it does not shine the surface, rub the area with a dry rag and the surface will shine and appear as new.