Dip a cloth into the water and buff the stained area of the silestone until all residual traces of bleach are removed.
Buff the area with a dry cloth until the countertop is completely dry. Allow the surface to air dry for an hour so any remaining moisture will evaporate.
Spray a small amount of multi-purpose furniture spray onto another clean, dry microfiber cloth. Buff the stained areas of the silestone with the cloth. Allow the spray to dry completely.
Reapply additional multi-purpose furniture spray after the first coat has dried. Allow to dry completely.