In the last decades, global warming and environmental pollution forced the researchers create a "cleaner" technology for all the fields of life. Self-cleaning textiles are products of these new technology finishing processes that can stop or decrease the consumption of water, energy and chemicals (detergents) for textile cleaning. There are two ways to keep the textile material clean: to prevent contamination with a super hydrophobic approach, to break down the organic soil with photo-catalysis in a super hydrophilic approach. Super-hydrophilic surfaces consist of photocatalytic layers that are made of thin nano-crystalline titanium dioxide. Titanium dioxide is a photocatalytic semiconductor and can break down the organic materials under solar irradiation. In this paper, the second way is discussed.