Place a drop cloth on the floor beneath the wall you are cleaning. Pour 1 cup of white vinegar in a clean bucket.
Add a 1/2 gallon of water to the bucket. Put on rubber gloves and safety glasses.
Dip a clean sponge in the vinegar and water. Squeeze excess fluid out of the sponge and begin wiping down the walls.
Allow the walls to air dry. There is no need to rinse off the solution. The vinegar odor will not last.