Summer months often mean homeowners use pressure washers to clean the sides of their home, decks and windows. When using a pressure washer, be mindful of the type of detergent you use. A chemical-based one with phosphates can hurt outdoor plants and leach into waterways. Instead, try this eco-friendly DIY recipe: Mix 1/3-cup phosphate-free laundry detergent, 1 gallon of water and 1 quart of white vinegar. It'll clean the gunk and keep the environment happy.