How to Remove Rainwater from Side Windows

To effectively remove rainwater from side windows while driving, start by ensuring your windscreen wipers are in good condition and your side windows are clean. Rainwater can obscure visibility, so here’s how to manage it:

1. Use a water-repellent treatment. Products like Rain-X create a hydrophobic layer, causing water to bead and roll off. Apply it to clean side windows for best results.
2. Adjust your speed. Driving slower reduces wind pressure, minimising water accumulation on side windows.
3. Open and close the window slightly. This can dislodge water droplets, improving visibility.
4. Check your car’s seals. Worn door seals may allow water to seep in, so replace them if necessary.

For electric vehicles like the Tesla Model 3 or Nissan Leaf, ensure the window seals are intact, as their frameless designs can sometimes trap water. Regular maintenance, including cleaning the window channels, prevents water buildup. If rainwater persists, consider upgrading to better wipers or applying a fresh coat of water repellent every few months.

From a practical driving perspective, rainwater on side windows can be managed by tilting the windows slightly. Lowering them by about an inch allows airflow to push water off the glass. This works well on motorways where speed generates enough wind force. However, avoid opening them fully in heavy rain to prevent water entering the cabin. Models like the Ford Focus or Vauxhall Corsa handle this well due to their aerodynamic designs.

1. Apply soap. Rub soap onto the side window glass, allow it to harden, then wipe it off with a cloth. This will leave a thin wax layer on the glass surface, providing excellent water repellency.
2. Use a water repellent spray. Apply a specialist water repellent to the side windows, which forms a hydrophobic coating to prevent water accumulation.
3. Fit a waterproof film. Applying a waterproof film to side windows directly prevents rainwater from gathering, maintaining clear visibility.
4. Install rubber strips. Insert rubber strips into the side window glass channels to wipe away rainwater when operating the windows.
5. Manual wiping. Use a cloth or paper towel to manually remove rainwater from the windows, though this method is rather cumbersome.

When driving in rainy conditions, rainwater on side windows obscures wing mirror visibility, preventing drivers from properly assessing following traffic and compromising road safety. Therefore, removing side window rainwater is crucial.

Furthermore, drivers must never attempt to wipe windows while the vehicle is in motion. If visibility is impaired, one should pull over to address the issue before continuing the journey.