Tired of squinting through a smeared windscreen or struggling to see when motorway spray hits? In this post, we’ll answer common questions most people Google in a panic from "Where do you put screen wash?" to "How do you check and refill screen wash properly?"
We’re also going one step further — by busting five common myths that could be damaging your windscreen, reducing your visibility, or even costing you more money long term. Most drivers get at least one of these wrong.
Where Does Screen Wash Go?
If you’ve ever popped the bonnet and thought “...now what?”, you’re not alone.
The screen wash reservoir is typically located in the engine bay and is often marked with a bright blue, yellow, or white cap. Most of the time, it’ll have a small icon that shows a windscreen with spray droplets over it.
How to Top Up Your Windscreen Wash
Refilling screen wash is super simple once you know how:
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Open your bonnet (refer to your car manual if unsure how).
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Locate the screen wash reservoir cap. Look for the windscreen spray icon.
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Drop in one tablet of concentrated screen wash.
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Add 5L of water. Tap water is fine.
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Close the cap securely, and you’re done.
And just like that, you're good to go—with a crystal-clear windscreen.
5 Screen Wash Myths You Should Stop Believing
It’s easy to assume you’ve got it right because it seems simple. But that’s exactly why so many myths still circulate. From outdated advice to viral “quick hacks” that miss the mark, a lot of what people believe just doesn’t hold up. Here’s what you might think is true, but isn’t.
Myth 1: “You only need screen wash in winter.”
Why people believe that: They assume screen wash is just for slush during cold months.
What really happens: Summer grime like bugs, sap, droppings, and pollen can smear your windscreen. Combined with sun glare, it reduces visibility and slows reaction time—potentially leading to accidents. Premium screen wash tackles all these year-round issues.
Bottom line: Keep it topped up—it’s not just winter kit.
Myth 2: “Water alone does the job.”
Why people believe that: It’s free and feels convenient.
What goes wrong: Water lacks the ingredients to cut through oily traffic film or insect debris and freezes around 0 °C, which can crack reservoirs or jets.
What to do: Use proper screen wash—with anti-freeze properties added if temperatures dip.
Myth 3: “Driving eco just means better tyres and MPG.”
Why people believe it: Fuel efficiency and tyres are the most obvious ways to go green.
What they miss: Eco-driving isn’t just about how the car moves—it’s also about what you put into it. Reducing plastic waste, cutting down on transport emissions, and avoiding harsh chemicals all play a part in lowering your footprint.
The subtle switch: If you're serious about sustainable motoring, start with small, smart upgrades—like using eco friendly screen wash tablets. It’s a simple move with tons of impact: less waste, less pollution, same spotless windscreen.
Myth 4: “Washing-up liquid or vinegar works just as well.”
Why people believe it: They’re degreasers, and hey—if it cleans dishes, it should clean windscreens... right?
What’s wrong with that: Washing-up liquid foams too much, smears badly, and damages rubber seals. Vinegar is acidic—it can wear down paint or plastic unless neutralised (which adds more hassle).
The smarter option: Stick with products made for cars—like automotive-grade screen wash or concentrated tablets that dissolve fast and clean deep.
Myth 5: “All screen wash are the same.”
Why people believe it: It’s just coloured liquid that cleans the windscreen—why pay more?
What’s wrong with that: Cheap screen wash often smears, lacks cleaning power, and can freeze or damage your washer system. Some even contain harsh chemicals that harm paint and rubber seals over time.
The smarter option: Go for quality. Top-rated screen wash with advanced biosurfactants cleans better, lasts longer, and protects your car from costly wear.