Review: The Karcher WV2 Window Vacuum Cleaner

Review: The Karcher WV2 Window Vacuum Cleaner

I've just moved into a new home and the bathroom has no extractor fan. After my weekday morning showers, there's so much condensation left on the windows, just before I have to leave for work. This is a real pain because I really don't like leaving it this way, and of course, I can't leave the window wide open while I'm away all day. The windows also need a jolly good clean, so Tom recommended I try out the Karcher Window Vacuum Cleaner.

Here's what you get in the box: 

  • The Karcher WV2 Window Vac
  • A wide suction head
  • A narrow suction head
  • Spray bottle
  • A microfibre cleaning head
  • Window cleaning concentrate
  • Charger
  • An instruction booklet

How to use the Karcher WV2 Window Vac:

I was shown briefly how to use the Window Vac Cleaner on the office windows, but it's so simple to use that anyone can use it.

1. First you have to mix the little sachet of cleaning liquid into the spray bottle. Then use this to spray the mixture onto the windows. Using the cloth wiper attached to the bottle, wipe the mixture around. This spreads out the cleaning liquid and lifts up the dirt. You can see all the dirt from the office windows left on the wiper in my photos, sorry about that!

2. After you've used the spray and wiper head, grab the Window Vac and pull the blade using downward motions on the window until all the dirt and cleaning fluid gets sucked into the machine and the pane is left nice and dry. Easy.

The Karcher Window Vacuum Cleaner Kit.

At home:

After the quick tutorial at work, I took my trusty Window Vac home to try it out for myself. The next day I had my morning shower, and everything inevitably steamed up. Grabbing the spray bottle, it was time to clean.

All set to go
All set to go!

All you have to do is open the bottle, add the cleaning sachet that's included in your box, fill it with water and then spray the shower door. There's something quite satisfying about using the spray cleaner, and the microfibre head makes it super-easy to glide across the glass. After you've done this, pick up your Window Vac.

On the inside
Side one.

I moved it from top to bottom on my shower door and hey presto, the Window Vac sucked up all the dirt and condensation up, leaving it completely dry. Unfortunately, it revealed how dirty the other side of the glass was, so I had to immediately clean that too. How lovely and shiny the glass looks now!

On the other side
Side two.

The WV2 Window Vac really is a joy - dare I say it, perhaps cleaning becomes more fun when you get to use gadgets like this. The box even includes a smaller head attachment for different areas of your home and it would work wonderfully on smaller windows.

The most impressive thing about this cleaning system is that the glass was left dry and completely streak-free. This is something I've never seen before as normally I use washcloths which tend to leave marks - whereas this didn't. I took the Window Vac over to the windows and LOOK...


So impressive! It actually made cleaning the windows a joy, which is something I can't say about many cleaning products, or cleaning generally. I genuinely can't wait to try it on all my other windows.

More benefits

  • Dirty cloth wipers? Chuck them into a washing machine and you can use them again and again!
  • A rechargeable battery and charger are included so you don't have to buy any batteries.
  • Use it on bathroom tiles, mirrors, car windows.
  • Easy empty plug for the dirty water.
  • Leaves your surfaces completely dry and streak-free.

Final word

If you hate cleaning, have high levels of condensation in your home or just want to make cleaning windows as easy as it can be, then this product is for you. It's an impressive gadget and it is actually rather fun to use. You can buy the Karcher Window Vacuum Cleaner on Amazon.


Colleen B


Lifelong biscuit addict. Obsessed with recipes, cooking & eating. Slightly lazier than the average bear, so likes writing about life hacks & discovering the quickest / easiest way to do things.

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  1. Author Enid on September 23, 2016 at 1:35 pm

    Have to agree this window cleaner by Karcher is FANTASTIC I have used all known methods to clean windows mirrors tiles before this really IS THE ANSWER Every home should have one

    1. Author Colleen B on October 6, 2016 at 10:23 am

      Thanks for your comment Enid - I agree, they're pretty special!

  2. Author Garbiel Brown on June 22, 2017 at 7:20 pm

    It's really a great post. Window cleaning service is not an easy task. It needs special skill. You can contact Window Cleaning Fort McMurray for your job.

    1. Author Stephanie C on June 26, 2017 at 9:22 am

      Hi Garbiel. Thanks a lot for your kind comments - I'm glad you liked the review! :)

  3. Author Sandra Gardner on January 9, 2018 at 7:19 am

    This is a really good product when it works - I have had two and both have stopped working - the first one was replaced under warranty but the second they would not replace even though there appears to be a fault in the design of the on and off switch - it does not work when it is in the slot in the handle but it does work when it is removed and laying flat on the handle (it would appear the cavity where the switch sits is too big and therefore will not switch on) - has anybody else experienced this problem with the switch. I have contacted Karcher but they are just not interested and very unhelpful

    1. Author Colleen B on January 10, 2018 at 11:22 am

      Hi Sandra, That doesn't sound good at all. Have you tried to contact them on social media too? Sometimes that helps move a problem along,

  4. Author Nigel H on December 6, 2018 at 3:49 am

    Just used my wv2 for the first time, and agree it's very effective, and almost fun. Does anyone use anything EXCEPT the Karcher fluid as the cleaner? Would be interested to hear if people continue to buy their cleaner (like printers with ink) or have others tried it with other cheaper detergents or vinegar? Cheers

  5. Author Irene on July 29, 2021 at 12:20 am

    I bought one of these 'window cleaners' windows were left streaky so not impressed. :(

    1. Author Joanne A on July 29, 2021 at 9:47 am

      Sorry to hear that, Irene! Did you use the Karcher cleaning solution?

  6. Author Hannah on July 29, 2022 at 3:50 pm

    I have used the cleaning fluid called 'Blue Magic' ( diluted and has no smell ) with very good results also tried diluted flash liquid which also worked and left a nice fresh smell but only use a little as it can be too soapy. My karcher window vac is 5 years old and I have not had any problems with it . I don't recommend vinegar as this could perish the rubber blades over time.

    1. Author Joanne A on September 6, 2022 at 12:46 pm

      Thanks for the tip!

    2. Author Pat on December 31, 2023 at 11:24 am

      I’ve had mine for years and it’s still going strong I love it.

    3. Author Joanne A on January 3, 2024 at 12:54 pm

      That's great to hear!


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