How to Deal with Poor Visibility in Rearview Mirrors Due to Rain?
2 Answers
When rearview mirrors are hard to see clearly in rainy weather, you can use methods such as heated rearview mirrors, installing rain deflectors, applying specialized rain repellent, rubbing soap, or using insect repellent. Below are some relevant methods for improving rearview mirror visibility during rain: 1. Using soap or detergent cleaners: Cleaners contain surfactants, whose hydrophobic groups physically repel water, preventing water droplets from forming. The method is simple: apply or spray soapy water or detergent water on the rearview mirror and let it dry. Although this method is very convenient, its effect is short-lived, lasting only about 2 days. 2. Waxing the rearview mirror: When water is on a waxed surface, the internal cohesion of water exceeds its adhesion, preventing water droplets from forming, similar to the principle of lotus leaves. Although waxing is also simple, wax is highly affected by temperature. If not done properly, it can impair visibility, so this method is not commonly used.
I particularly enjoy researching various car life hacks, and the issue of rainwater on rearview mirrors is all too common. The most effective solution is to use an anti-rain treatment for mirrors - after drying the mirror surface, apply the treatment and water droplets will automatically roll off without leaving traces. I personally apply a layer after every car wash, and it lasts for two to three weeks. You could also consider switching to heated mirrors, a feature that comes standard on many new car models. There's also a DIY method using diluted dish soap to wipe the mirror surface, which provides temporary rain protection for two to three days. Before driving in the rain, it's best to keep a microfiber towel in your car to quickly wipe the mirrors at red lights. For areas with frequent rainfall, I recommend installing mirror rain guards - they cost just a few dozen yuan and can be easily applied yourself, effectively keeping light rain off the mirror surface.
