Heavy rain at night is the hardest driving most people do regularly. Visibility drops, everything reflects, and the margin for error shrinks considerably.
A lot of advice about this is vague. Here is the practical version — what to do with the car, and what to do with your driving.
Start with the glass, on both faces
Rain driving often feels worse due to windshield film. Half the time, it is on the inside.
Water on oily film scatters headlights twice. It passes through the water and then the film. This makes hazy glass difficult in wet night conditions.
Clean both faces properly before doing anything else. Two microfiber towels, cool glass, in shade. Vertical passes outside, horizontal inside so you can tell which face any remaining streak is on.
Replace the wipers before you need them
Wiper blades degrade from UV and heat. Cars parked outside need new blades sooner than mileage suggests.
Worn blades cause chatter, streaking, or hazy bands. They may skip sections of glass. These blades need replacing, not cleaning.
Do it in September rather than in the middle of the first storm. Blades are cheap and this is the highest-value maintenance item for wet-weather visibility.
Use a water-repellent coating
This is the change most people notice immediately.
Water spreads into sheets on untreated glass. Hydrophobic layers pull water into beads. Airflow removes these beads above forty miles per hour.
You can drop wiper settings in steady rain. Highway windshields often clear themselves. Less wiper movement improves your field of view.
Treat the side windows and mirrors too. Those are the surfaces you depend on when changing lanes in the rain and almost nobody treats them.
Deal with fogging before you set off
Rain means humidity, and humidity means the inside of the glass fogs.
Use heat, air conditioning, and fresh air on the windshield. AC dehumidifies regardless of temperature. This clears glass faster than heat alone. Use fresh air instead of recirculate to remove humid cabin air.
Wet floor mats are the biggest hidden cause of persistent fogging in wet weather. If your footwells are damp, dry them properly.
Improving driving in rain visibility: Change how you drive, not just what you can see
Headlights on, always. Not for you — so other drivers can see you. Daytime running lights usually do not illuminate your rear lights.
Avoid full beam in heavy rain. Light reflects off water and back at you. This reduces what you can see.
Double your following distance. Wet braking distances are longer. You need more time to react to hazards.
Stay out of the outside lane on standing water. Water pools where the road camber sends it. Following the tire tracks of the vehicle ahead puts you on the driest part of the lane.
If you aquaplane, do nothing sudden. Ease off the accelerator, keep the wheel straight, do not brake hard. The tires will regain contact.
Check your tires
Tread depth is what clears water from between the tire and the road. Below about 3mm, wet braking distances increase sharply — well before the legal minimum.
Check pressures monthly as well. Underinflated tires aquaplane at lower speeds.
The short version
Clean both faces of the windshield. New wipers. A repellent coating on the glass, including the side windows. Heat and AC together for fog. Lights on, distance up, tires checked.
ClearVision™ Glass Cleaner handles two tasks. It removes light-scattering film and leaves a repellent layer.
Questions?
Have questions about your glass, your order, or which product fits your situation? Reach out to us at https://clearvisioncleaner.com/pages/contact and we will get back to you.
