Use a pressure washer with a surface cleaner attachment for even cleaning. Pre-treat stains with a degreaser or cleaning solution for tough spots like oil. Work in sections and rinse thoroughly.
For wood decks, avoid high-pressure washing to prevent damage. Use a deck cleaner and scrub gently with a brush or low-pressure washer. For composite decking, check the manufacturers cleaning guidelines.
Always check for cracks or loose materials before cleaning and repair them if necessary.