Ready-to-use windshield washer with strong detergent effect. It can be used undiluted or mixed with water. The surface-active substances that make up the washer fluid are effectively removed from the windshield and car headlights, fatty spots and water-insoluble contaminants, including insects. Environmentally friendly, does not contain methanol, acetone and acids. Does not cause light refraction. Does not aggressively affect paint coatings. It is allowed to use at ambient temperature not lower than -2° C.