Remove any furnishings, toys, grills, planters or other items from the deck's surface. Sweep the area with a stiff brush to remove leaves, dust or dirt. Spray the entire deck down with a garden hose to remove any residual dirt. Protect any surrounding plants with plastic sheeting.
The best method of deck cleaning depends on the deck's condition. For a lightly soiled deck, a commercially available deck cleaning product can be applied with a heavy duty roller and rinsed with water. If the deck shows a great deal of wear or dirt, use a pressure washer for best results. Use the fan setting on the washer to avoid damaging the wood surface.
The deck may be stained if desired. For best results use an oil-based stain to achieve longer-lasting results than with a water-based stain. Avoid solid stains as they don't stand up well to regular foot traffic and will require frequent touch-ups. Thoroughly wash and dry the surface before staining. Apply the stain with a roller, brush or sprayer.
Another popular deck treatment option is a clear water repellent or preservative. This will protect the deck from the elements while allowing the natural color and grain to show through. This is only a valid option for decks that are in good condition. A clear water repellent will allow the deck to silver or gray as it ages. A clear wood preservative will also help to retain the wood's original color.