Why is thorough rinsing important after washing?

Thorough rinsing is crucial after washing because it effectively prevents soap scum and streaks from forming on the surface of the vehicle. When soap or detergent is left to dry on the surface, it can leave behind residues that create unsightly marks, dullness, or a hazy appearance. Proper rinsing ensures that all washing agents and dirt are completely removed, resulting in a clean and shiny finish without any visual imperfections. This step is essential for maintaining the aesthetic appeal of the vehicle and ensuring it looks its best after a wash.