Some of the major paver cleaning issues are grease and oil from autos, rust from sprinklers, leaf, grass & berry stains. Anyone who is cleaning pavers & concrete can now use the product that the Paver-Tec pros use : Some of the major paver cleaning issues are grease and oil from autos, rust from sprinklers, leaf, grass & berry stains. Anyone who is cleaning pavers & concrete can now use the product that the Paver-Tec pros use :