According to a recent study by Monash University’s Accident Research Centre, a driver is slower to react and twice as likely to crash if their vehicle’s windscreen is dirty.

Researchers used a driving simulator to test if dirty or damaged windscreens impact a driver’s vision. The findings revealed older drivers experienced more difficulty seeing, particularly through dusty windscreens, which can create glare on sunny days.

RAA Senior Manager for Safety and Infrastructure, Charles Mountain, says glare created by dust and light can be just as dangerous as mud.

“The windscreen is more likely to fog-up and reduce a driver’s visibility of the road if the screen is dirty,” Mr Mountain says.

In foggy driving conditions, dust particles make it easier for the moisture in the air to hang on, which is why a dusty windshield will fog up faster than a clean windshield.

“A dirty windscreen can reduce visibility, as it collects dust outside and can get an oily film from the spray thrown by other vehicles,” Mr Mountain says.

“This can impact visibility, particularly from the bright headlights of oncoming vehicles or sunny days.”

Driving on dirt roads can especially cause a build-up of debris and dust on your windscreen.

A dirty windscreen can reduce visibility, as it collects dust outside and can get an oily film from the spray thrown by other vehicles.

“When driving on country roads, it’s especially important to make sure your wiper blades are in good nick and your vehicle’s washer fluid bottle is topped up,” he says.

The Australian Road Rules state a driver must be in control of a vehicle. Driving with a dirty windscreen can breach this rule.

Here are some simple ways to keep your windscreens clear to avoid landing you in trouble.

1. Check that your windscreen wiper blades are in good condition. Streaking on the glass or scrapping noises are usually the first sign the blades need replacing.

2. Avoid using your wipers when the windscreen is dry or nearly dry, as this can scratch the screen and shorten the life of the blades. Use the wash/wipe function to help the wipers clear the screen more effectively. When you park your vehicle, turn off the wipers before the engine otherwise the wipers may unnecessarily sweep the screen next time you start up.

3. Check your washer container to ensure it is regularly topped up with water.

4. Clean the windscreen from the inside with a glass cleaner. Use a clean microfibre cloth and wipe the screen in long, smooth strokes to remove any oily film, streak-free. While you’re at it, give the rear-view mirror and the inside of the rear window a clean as well.

5. Start by cleaning your windscreen from the passenger’s side, as you may find that your steering wheel gets in the way.