Convenient Cleaning: These super concentrated automotive glass wiper cleaning tablets dissolve in water to create a powerful windshield washer fluid. Effective Formula: The concentrated formula effectively removes dirt, grime, and insect residue from car windshields and glass surfaces. Compact and Portable: The solid tablet form makes them easy to store and carry, eliminating the need for bulky liquid containers. Long-Lasting: Each tablet can make up to 4 litres of windshield washer fluid, providing a long-lasting cleaning solution. Versatile Usage: Suitable for use in all seasons and weather conditions, these tablets can be used in both summer and winter windshield washer reservoirs.