Window Talk

A few days ago I had a phone call from a new customer asking why his windows were still wet, and when were we going back to “finish the job”

This got me thinking, we have been using the water fed pole method of cleaning for over 10 years now, and perhaps take for granted that everyone knows it’s the “new way” and just works. So a couple of things have come out of this. Firstly its given me a good topic to start this blog, and secondly its made me realise that there are still many people out there who don’t understand how our system works, so we need to address that issue whenever we take on a new customer.

So how does it work? ….. Well, in simplistic terms, the water is highly purified, this allows us to clean and rinse the windows leaving no trace once they are dry.

But how?… Well our water starts its life cycle as rain, in this state it is so pure we could happily clean windows with it and achieve a superb result, sadly we are unable to capture enough so have to use tap water, however before it gets to our taps the rain has passed through the ground, along rivers into reservoir’s before being processed for us. Along the way it picks up many minerals along with other not so nice stuff. The water companies remove all the nasty stuff but leave most of the minerals behind. These are actually good for us so no need for concern. We measure these “solids” in the water using a TDS Meter. (Total Dissolved Solids) In some places such as parts of Scotland this mineral content is extremely low, around 25ppm (Parts Per Million) however in other areas it gets quite high. For instance in the Spalding area we seem to average around 450ppm.

We take this water and pass it through a Reverse Osmosis filter system. (RO) This is a series of filters, which are so fine in order to work efficiently need the water to be put under a pressure of around 100-130psi. These filters bring the TDS down to around 9 – 15 ppm. At this level we could clean windows and get a good result, but to be sure we then put the water through another filtration in the form of a Deionised resin bead (DI). This polishes the water right down to 000 ppm.

Now the water is as pure as the rain it started as, in fact more so, it is now considered laboratory grade. It is then pumped into the holding tanks in each vehicle and we are ready to clean windows.

The brushes we use have been specifically designed for this job, they are soft enough to not scratch but tough enough to remove even the most suborn marks. Using extendable poles to reach even the most awkward windows we give everything a good scrub, glass, frames, sills and doors everything gets the same treatment. By doing this we put all the dirt from the windows into a solution where its swimming on the glass. All we need to do now is rinse all that dirty water away using our pure water until the only water remaining is crystal clear. Its not like a pressure washer, in fact we only need to use about 1 litre a minute so an entire house only uses a moderate amount of water.

If we were to use untreated tap water or the dirty water was not rinsed properly the result would be spots. Just like the ones that are so common in the home when you splash a window or mirror. The water evaporates but everything within the water such as minerals, soap, dirt and anything else gets left behind.

With our water there is quite simply nothing in it, so it evaporates and all that is left, is glass.

When I first started using wfp (water fed pole) something unexpected happened. Many of my existing customers commented that their windows “stayed clean for longer” it took me a while to figure out why. But its actually quite a simple explanation. I was a traditional cleaner and like every other cleaner up and down the country I used good old Fairy Liquid in my water. It does a great job and I never had any complaints. However it leaves a very very thin film of detergent on the glass after we have finished. If you have every seen fairy that’s been spilled and dried you will know how sticky it is. Well the detergent left on the glass although microscopic is also sticky, so as dust touches the glass it stays there. With pure water that does not happen, so as many people have noticed, Windows do actually stay clean for longer than before.