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There are currently three models in the Karcher range WV50, WV60 and WV70. I have been sent the WV50 and WV70.

The WV50 is the cheapest at around £50 and has the least in the box basically a wiper blade attached to a handheld vacuum. Of course there is more to it than that but just looking that is what you see.

I am old enough to remember newsprint, rather different to the newspapers of today as the print could come off onto your hands as it was printed ink onto a press. However this was a very good way of getting a good shine on Windows.

The unit is 28cm wide – the width of the wiper blade – 35cm long and 9cm deep. You also get a DC charger that fits into the top of the rear of the unit. With this model you need to wash your Windows in the normal way to loosen the dirt then after charging the vacuum and before the windows have time to dry run the wiper blade over the windows in the way professional cleaners do, the difference is that with the motor on the dirty water residue is sucked into the container attached to the unit so no streaks. 

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That is basically the whole operation the only problem is that not all windows are 28cm wide and certainly not a perfect rectangle. However if you have large Windows and a good detergent solution for cleaning them this unit will leave the professional finish.

The Karcher WV50 is available from the link below for £49.95 with free delivery.

http://www.amazon.co.uk/gp/product/B004E9QSO0?ie=UTF8&tag=gadge0a-21&linkCode=as2&camp=1634

Now onto the WV50 this solves the problems of smaller window panes by being supplied with both the 28cm wide blade and a smaller 17cm blade, it also comes with cleaning solution a bottle and pads to do the initial cleaning in fact the complete job in the box.

These days professional window cleaners are not - I am told - allowed to clime ladders –health and safety – and I have seen long poles with a hose attached being used to clean upstairs windows. I wonder how good the finish is.

So the action to dry is the same as with the WV50 except that smaller windows can be dealt with using the smaller 17cm wiper head, you do still get the 28cm head in the box as well and also spare blades for both wiping heads.

You also get cleaning concentrate which you spray on the windows and fabric – like sheepskin – pads to help remove the stubborn deposits and these pads fit just above the spray bottle nozzle so cleaning and removing the difficult bits can be done in one process. You then have windows ready for the vacuum and either the 28cm or 17cm head according to your window size.

All the windows I cleaned with the Karcher unit looked good and they do appear to let more light in so you are less likely to need electric light. However as my tests were made in spring there is more – and brighter – light about.

So cleaning a bungalow is easy and it works for me. Most people live in houses with more than a single storey and for this Karcher do an extension pole, I have not seen one of these so I cannot comment on what sort of job it does, according to the press release it fits onto the vacuum unit to extend your reach.

The Karcher VW70 is available from the link below for £79.95 with free delivery.

http://www.amazon.co.uk/gp/product/B009PN0WG0?ie=UTF8&tag=gadge0a-21&linkCode=as2&camp=1634