Best window vacuums for condensation: clear wet windows in seconds
If you wake up to streaming windows every winter morning, a window vacuum sucks the water off in seconds instead of leaving soggy towels on the sill. Here are five worth buying, plus what a window vac can and can't do about damp.
Quick picks
- Best overallKärcher WV 2 cordless window vac, 35-minute runtimeCheck price
- Best budget and lightestKärcher WV 1 cordless window vac, 20-minute runtimeCheck price
- Best for big housesKärcher WV 6 Plus cordless window vac with spray bottle, 100-minute runtimeCheck price
- Best for small panesBosch GlassVAC cordless window vacuumCheck price
- Best with an extension poleSwan x Lynsey cordless window vacuum with extension pole and spray bottle (SC59010QOC)Check price
How we chose: We compared popular cordless window vacuums on Amazon.co.uk from established brands, checking runtime, nozzle width, tank size, what's included, warranty and seller from listings and manufacturers. We looked for recurring themes in Amazon.co.uk owner feedback, especially streaks, leaks and battery life, and left out a popular budget model with frequent reports of leaking and early failure. Advice on damp and condensation comes from GOV.UK and the Energy Saving Trust. We have not personally tested these products; this is a research-based roundup. Our research process.
A window vacuum is a cordless squeegee with a small motor that sucks water into a tank as you draw it down the glass. On a winter morning it clears condensation from a whole window in a few seconds, without wet cloths on the sill or water running onto the frame, where it can lead to black mould. The same tool cleans windows with a spray bottle, keeps shower screens free of water spots and dries mirrors and tiles.
It's a quick fix for the symptom, not the cause. GOV.UK guidance describes condensation as the most common form of damp and says that removing surface moisture won't stop it coming back. If your windows are wet most mornings, work through the free fixes in our guide to stopping condensation on windows, and consider a dehumidifier to bring the humidity down.
Who this guide is for: Anyone with wet windows on winter mornings, especially in bedrooms, flats and older homes with single or older double glazing, plus anyone who wants streak-free shower screens and mirrors. It's a cheap, useful gift for new homeowners and renters too. If the problem is damp patches or mould on walls rather than wet glass, see our dehumidifier guide and, for cold rooms, our desiccant dehumidifier guide.
Black Friday tip: Black Friday is Friday 27 November 2026. If you need this now for the cold or damp, don’t wait weeks for a possible discount. If you can wait, our Black Friday home buying guide explains how to check price history and spot a genuine deal.
Comparison table
| Pick | Runtime (maker) | Nozzle | Best for | Warranty | Amazon |
|---|---|---|---|---|---|
| Kärcher WV 2Best overall | 35 minutes | 280mm | Most homes | 2 years | Check price |
| Kärcher WV 1Best budget and lightest | 20 minutes | Not stated | Condensation, small homes | 2 years | Check price |
| Kärcher WV 6 PlusBest for big houses | 100 minutes | 280mm | Large homes | Check listing | Check price |
| Bosch GlassVACBest for small panes | 30 minutes | Interchangeable attachments | Small panes, cars | Check listing | Check price |
| Swan x Lynsey window vacBest with an extension pole | 35 minutes | Not stated | High glass | 1 year, plus 1 on registration | Check price |
Specs are from manufacturer listings as of 20 October 2026; claimed figures (running costs, runtimes) are the maker’s, not ours. Check the Amazon page for the current price and exact variant before you buy.
The picks in detail
Kärcher WV 2 cordless window vac, 35-minute runtime
Best for: Daily condensation and weekly window and shower cleaning
- Runtime (maker)
- 35 minutes
- Nozzle
- 280mm
- Best for
- Most homes
- Warranty
- 2 years
The WV 2 is the sensible middle of its range: a 280mm suction nozzle that covers a standard window pane in a few strokes and 35 minutes of runtime, plus an LED battery display. It's sold by Amazon with Kärcher's 2-year warranty.
Owners say it's brilliant for removing condensation, good value and useful in wet rooms and bathrooms. Battery life and durability get mixed reviews, with a few reporting faults within months, so register it with Kärcher when it arrives. This version doesn't list a spray bottle in its features; add the Kärcher RM 500 window cleaner concentrate if you want to wash windows as well as dry them.
What owners and reviewers like
- Wide 280mm nozzle
- 35-minute runtime
- Battery level display
Watch-outs
- Spray bottle not listed as included
- Some durability complaints
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Kärcher WV 1 cordless window vac, 20-minute runtime
Best for: A quick condensation sweep every morning
- Runtime (maker)
- 20 minutes
- Nozzle
- Not stated
- Best for
- Condensation, small homes
- Warranty
- 2 years
Kärcher's entry-level window vac weighs 0.5kg, according to Kärcher, so it's easy to use one-handed. It has a 100ml dirty water tank, an LED battery display and 20 minutes of runtime, which is plenty for a morning condensation sweep of a flat or a few bedrooms. It's sold by Amazon with a 2-year manufacturer warranty.
Owners say it's effective at removing condensation, especially from shower doors and tiles, easy to use and light enough for people with joint problems. Some find they need to charge it every other day. If you also want to clean all the windows in a bigger house, the WV 2's longer runtime is worth the extra.
What owners and reviewers like
- Very light
- Cheapest Kärcher
- Ideal for daily condensation
Watch-outs
- 20-minute runtime
- Smaller tank
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Kärcher WV 6 Plus cordless window vac with spray bottle, 100-minute runtime
Best for: Larger homes, conservatories and lots of glass
- Runtime (maker)
- 100 minutes
- Nozzle
- 280mm
- Best for
- Large homes
- Warranty
- Check listing
The long-distance runner: Kärcher quotes 100 minutes of runtime, enough to do every window in a large house on one charge. It has the same 280mm nozzle as the WV 2 and an LED battery indicator, and the Plus kit includes a spray bottle with a microfibre cloth and 20ml of window cleaner concentrate. It's sold by Amazon.
Owners love the battery life, with one saying two complete house windows used only about a quarter of the charge, and say it makes window washing easy. Streaks, suction and leaks from the water collection tank get mixed feedback, so empty the tank before it gets full and keep the blade clean.
What owners and reviewers like
- 100-minute runtime
- Spray bottle and cloth included
- Wide nozzle
Watch-outs
- Some leak reports from the tank
- Overkill for a small flat
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Bosch GlassVAC cordless window vacuum
Best for: Smaller window panes, mirrors and car windscreens
- Runtime (maker)
- 30 minutes
- Nozzle
- Interchangeable attachments
- Best for
- Small panes, cars
- Warranty
- Check listing
Bosch's window vac uses wiper-blade technology from its car parts business, and the attachments swap quickly, which helps on smaller panes and awkward spots. Bosch quotes 30 minutes of runtime, enough for up to 35 windows, with an LED battery display, and its compact shape keeps it clear of the windowsill. It's sold by Amazon.
Owners say it's effective, easy to set up and worth the money, with some preferring it to a Kärcher. They like it for smaller panes and car windscreens, and say full patio doors take under five minutes. Most report no streaks, though some see streak marks.
What owners and reviewers like
- Swappable attachments
- Compact for small panes
- Strong owner feedback
Watch-outs
- Some streaks reported
- Heavier than the Kärcher WV 1
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Swan x Lynsey cordless window vacuum with extension pole and spray bottle (SC59010QOC)
Best for: High windows, tall shower screens and conservatory glass
- Runtime (maker)
- 35 minutes
- Nozzle
- Not stated
- Best for
- High glass
- Warranty
- 1 year, plus 1 on registration
Part of Swan's range with TV cleaning expert Lynsey Crombie, this comes with an extension pole for high windows and tall shower screens, plus a spray bottle and cloth. Swan quotes 35 minutes of use from a 3-hour charge, and it carries a 1-year guarantee with an optional extra year when you register it online. It's sold by Swan's own store on Amazon.
Owners love its cleaning performance. Weight, the extension pole and streaks get mixed feedback, with some finding it heavy over a long session. It has far fewer reviews than the Kärchers, so treat it as the pick for reaching high glass rather than an all-rounder.
What owners and reviewers like
- Extension pole included
- Spray bottle and cloth
- Extra year of guarantee on registration
Watch-outs
- Fewer owner reviews
- Can feel heavy on the pole
- Sold by Swan's store, not Amazon
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How to use a window vac on condensation
- Do it first thing, before the water runs down onto the frame and sill.
- Start at the top of the pane and pull the nozzle straight down in overlapping strips, tilted slightly.
- Wipe the bottom edge of the glass and the rubber seals with a dry cloth; that's where black mould usually starts.
- Empty the tank down the sink, not back into a plant pot, and let it dry with the cap off now and then.
- Open a window or trickle vent for a while afterwards so the moisture leaves the house rather than just moving from the glass to the walls.
If the tank fills every day, that's a lot of water in the air. Our dehumidifiers guide explains how to bring the humidity down, and our guide to stopping condensation on windows covers the free fixes first.
Window vac or dehumidifier?
They do different jobs. A window vac clears water that has already condensed on cold glass; a dehumidifier takes moisture out of the air so less condenses in the first place. GOV.UK's damp and mould guidance says condensation is best tackled through ventilation, heating and energy efficiency, and that removing surface mould or moisture won't stop it coming back. A window vac is a cheap daily tool; if you're filling it every morning, a dehumidifier will make the bigger difference.
Cleaning windows and shower screens
For washing rather than drying, spray the glass with diluted cleaner, scrub with the microfibre cloth and then vacuum the water off. Kärcher's own RM 500 concentrate is diluted in the spray bottle; owners say it leaves windows streak-free and is good value. Clean outside windows on a dull day, because direct sun dries the glass before you can vacuum it.
On shower screens, a quick pass after every shower stops limescale water spots building up and is the main reason many owners say they use their window vac every day.
Look after the battery
Window vacs use small lithium batteries. Charge with the supplied charger, store it indoors rather than in a cold garage, and don't leave it flat for months over summer. Kärcher's models show the battery level on an LED display, which makes it easy to top up before it runs out mid-window.
FAQs
Do window vacuums work for condensation?
Yes. They're one of the quickest ways to clear condensation from windows, sucking the water into a tank in seconds rather than leaving it on the sill. They don't stop condensation forming, so pair one with ventilation or a dehumidifier if your windows are wet most mornings.
Which Kärcher window vac should I buy?
The WV 2 suits most homes, with a 280mm nozzle and 35-minute runtime. The WV 1 is lighter and cheaper for a daily condensation sweep, and the WV 6 Plus has a 100-minute runtime for large houses.
Can you use a window vac on shower screens and mirrors?
Yes. Window vacs work on any smooth, water-resistant surface, including shower screens, mirrors and tiles. A quick pass after showering helps prevent water spots.
Does a window vac stop mould?
It helps by removing water before it soaks into frames and seals, but it doesn't fix the cause. GOV.UK guidance says condensation needs tackling through ventilation, heating and energy efficiency.
Should I wait for Black Friday to buy a window vac?
If your windows are wet now, we wouldn't wait. Every week of condensation on frames and sills raises the risk of mould, and window vacs are an inexpensive buy.
Do you get commission?
Yes. If you buy through our links, Amazon may pay us a small commission at no extra cost to you. It doesn't affect which products we include. See our Affiliate Disclosure.
Sources we consulted
- GOV.UK: understanding and addressing the health risks of damp and mould in the home
- Energy Saving Trust: how to get rid of damp
Prices change constantly, so we don’t list them here. Always check the current price, seller and delivery details on Amazon before buying. If anything on this page looks wrong or out of date, tell us.
