SONAX XTREME Clear View Concentrate NanoPro, Summer Windshield Washer Concentrate. Very effective as an additive to the windshield washer system. Its nanotechnology makes it even more effective against insect residue. Does not cause stress cracks in headlights. Also ideal for high-quality XENON headlights and plastic headlights. Usage: Use the liquid diluted in a ratio of 1:100. 250ml.