Clean 18" at a time!  The SkySponge is designed to easily slide onto the Skymop allowing sponges to be replace or swapped out with other divices as needed.  The SkySponge is comprised of a dense-cell, heavy duty cellulose material which gently clings to the awning, allowing for a deep and throught clean.  the SkySponge is also economical to use; when one side wears out, just rotate and use the other side.