Hi, It’s fine if you have this problem. lmost all housewives who live in major cities with a lot of pollution in the air, from the smoke of passenger vehicles to buses and trucks, have to cope with it. . The buildings with chimneys will be added to these problems. The emission of carbon dioxide and soot into the air, and these pollutants build up on curtains, clothes, and sheets and making them dirty; the solution is Natar dishwashing bleach tablets. Put at least one or two tablets in the washing tank with liquid and powder and see how they become very white and clean after washing.