Power Washing Genie is the best commercial cleaning service in New Jersey. We provide a variety of cleaning services from power washing to soft or non-pressure washing service for all kinds of businesses .Non-Pressure Roof Cleaning A number of factors can cause your roof to old and dirty. These factors include, mold, lichens, mosses, algae or simply dirt. Black algae, also known as Gloeocapsa Magma, is a type of algae that thrives in humid and warm climates.