As mentioned, the best way to clean decking depends on whether you have wood or composite boards. However, there are five basic steps for cleaning all decks. 1. Clear Off the Deck Remove all furniture, plants, and deck décor . Once clear, inspect the decking for warping, discoloration, and spongy boards. Replace any rotted deck boards and tighten any loose screws and fasteners. 2. Sweep the Deck Boards Over time, debris will accumulate on top of your deck, which you need