How to Fill Screenwash in Your Car | Step-by-Step

Some drivers feel they don’t belong under the bonnet of their car, but topping up screenwash is a simple task once you know how.

Keeping your washer fluid topped up ensures clear visibility in rain, dirt or winter conditions — and it only takes a few minutes.

Step 1: Check Whether Screenwash Needs Diluting

Before pouring anything into your car:

• Check the packaging carefully.

• Some screenwash products need to be diluted.

• Others are ready mixed.

If dilution is required, follow the instructions on the bottle.

Your car’s screenwash tank could hold anywhere between 1.5 and 6 litres, so check your manual to mix the correct amount.

Step 2: Locate the Screenwash Cap

Lift the bonnet and look for a cap with a symbol showing:

• A windscreen

• Or washer jets spraying water

This marks the washer fluid reservoir.

Step 3: Fill the Screenwash Tank

• Remove the cap.

• Carefully pour in the fluid until it’s almost at the top.

• Replace the cap securely.

• Test the washer jets to ensure fluid is spraying correctly.

How Often Should You Top Up Screenwash?

There’s no fixed interval. It depends on usage and weather conditions.

You may need to top up more often:

• During winter

• After motorway driving

• In muddy or rainy conditions

It’s worth checking levels before long journeys.

Quick Answers

Where do you put screenwash in a car?

Under the bonnet, in the reservoir with a windscreen symbol on the cap.

Does screenwash need to be diluted?

Some products do. Always check the label before pouring.

How much screenwash does a car hold?

Typically between 1.5 and 6 litres, depending on the vehicle.

Can I use water instead of screenwash?

Water alone won’t clean effectively and can freeze in winter. Proper screenwash solution is recommended.