For most deck surfaces 1500 pounds per square inch (PSI) is more than sufficient. The next step is to choose an appropriate fan degree for the nozzle. Typically decks will need anywhere from a 25-degree nozzle (for more stubborn build-up) to 40-degree (for newer decks with less damage or synthetic wood).

The best soap to use in a pressure washer depends on the surface you're cleaning. It's best to choose a soap that works well for all surfaces, such as Krud Kutter Pressure Washer Concentrate and Sun Joe All-Purpose Pressure Washer Cleaner.

It usually takes 1-2 hours to pressure clean a driveway and it's the most effective solution for cleaning hard surfaces like concrete, asphalt, pavers and tiles.

Steam is introduced at much higher temperatures and a lower GPM flow. These cleaners don't just use pressure to remove the worst stuck-on dirt and grease. Instead, they use very hot steam to loosen and wash away stubborn stains and build-up. Because there's less water being used in steam cleaning, there is less runoff.