When you say 'shutter' do you mean a persiana (roller) blind ?
If so, then as Camposol says you can hose or with a sponge wash with liberal amounts of water, maybe with some detergent if really dirty. Or if just dusty, use a dry cloth, using insufficent water tends to make a 'muddy mess'.
Having installed and repaired many such blinds I would not recommend anyone to disassembling them.