With their natural tendency to absorb, wooden surfaces can lock in bacteria that'll fight back when you try to get it out. Baking soda is great for cleaning and deodorizing wooden surfaces. Mix 1/2 cup baking soda with a quart of warm water and use a clean sponge to rub it on the wood surface. Rinse with plain water, blot with a clean towel and allow to air dry completely.
You can then bring back the wood's natural finish by coating it with boiled linseed or vegetable oil and using fine steel wool to rub the oil in. Apply a couple more coats of oil 24 hours apart, wiping off the excess between each application.