Paths and driveways around the house are usually concrete paving stones. Every owner would like it to look like new for a long time. Unfortunately, even just after its laying, white spots may appear on the surface of the concrete. Over time the dust, sand, mud and other dirt become visible. Such soils, if they are not systematically removed, create sediments that not only change the colour of the surface but also facilitate the development of mosses and algae. The type of surface and stains determines which method of cleaning should be used.