Because hurricane shutters are so exposed to the elements, cleaning them is practically mandatory. Bronson recommends doing it twice a year with warm, soapy water and a brush. Be sure to get into all of the nooks and crannies, like individual slats and hinges. You'll also want to scrub in both the open and closed positions to be removed any salt, sand, or pieces of dirt that might be lodged. Lastly, avoid using any abrasive brushes, pads, or cleaners on the shutters, as this can cause damage.