What are some clever tricks for preventing rain on rearview mirrors?

[AlejandroLee]

Installing rain guards on the rearview mirrors can block water on the windows, keeping both the mirrors and side glass clear overall. When using, simply spray soapy water or detergent water onto the rearview mirrors and let them dry. However, this method has a short duration. When waxing, water on the waxed surface will have greater internal cohesion than adhesion, preventing water droplets from accumulating. Applying a water repellent to the rearview mirrors can maintain clear visibility. Its main component is silicone oil, which prevents water from adhering to the mirror surface.