Learn how to give your porch a bath with Fix It Up's deck-cleaning 101. There are several ways to clean a wood deck. This video describes how to properly use an over-the-counter deck cleaner. Give your deck a good sweeping to prepare for the cleaner. Mix the cleaner according to the directions, the apply with a sprayer and scrub with brushes. This will clean any stains and general weathering of the wood. Finally rinse with a garden hose. You should clean your deck at least once per year and after cleaning, be sure to apply a water repellent.