PRESSURE WASH EXTERIOR WALLS AND WALKWAYS  Over time, dirt and grime accumulate on your home's exterior walls and walkways. Rent a pressure washer, and give all those surfaces a good spray. If your home is relatively small, you can get away with using an electric washer. If it's bigger, go with a gas-powered one. If you are spraying siding or brick, you can spray as hard as you want. If you're spraying grout or a painted surface, move the nozzle back a little because the higher pressure can damage surfaces. You'll be amazed at how different your home will look afterward.