The exclusive working medium is the high pressure (150-3000 bars) water having extremely high kinetic energy without added reagents. At such a high pressure, water behaves like a concise cleaning material. By the different types of nozzles, the optimized shape and distance of the water jet can bet set for the attainable purpose. The cleaning of different surfaces used to be done by blast before. Under controlled circumstances we began experiments to compare the effectiveness of the two technologies. As a result, we achieved more than 5 times higher effectiveness with high pressure water.