[dazmond]

its easier for sure cleaning windows on warm sunny days as most windows are virtually dry by the time ive finished a property.in winter on cold damp days it can take a few hours for some windows to dry.

direct low sun will show up any marks/smears on a window.most of the time its on the inside(due to customers not having a clue how to clean a window properly)or even on the inside between the double glazing on manufacture(or seals blown).

of course occasionally i get the odd run or bit of spotting but its not often and most customers never notice or
if they do they never say anything!

[chris turner]

0ppm or 10ppm it doesn't matter, as long as the window is cleaned and rinsed properly the results should be good.
Around 25 ppm is the point you start getting spotting, I know that as a matter of fact.
A company I worked for many moons ago used resin only to filter water with a tap TDs of 349ppm. On average they would get 3 days out of an 11 litre vessel, changing at around 25ppm. We never had any issues, apart from the odd occasion the water crept above this point to 30 odd ppm, then the complaints came.

I personally prefer to keep my water under 3 ppm for peace of mind more then anything.
If anyone gets bad results with anything under 20ppm then 90% of the time it is through poor cleaning technique, i.e,. Not scrubbing properly, not rinsing properly, poor flow, not enough care taken around vents and/or badly eroded rubber seals.
The other 10% of the time is because of environmental issues ( wind, pollen, sap, pollution, dust from nearby building work) or issues with the glass itself ( limescale, blown glass, poor quality glazing unit etc).
Pilkinton glass is the worst, it looks awful in sunlight no matter how well it is cleaned. A local glazing company has stopped selling pilkinton due to the high number of complaints from these units. In direct sunlight they look really spotty, but it is usually particles between the glazing that show up more so then any other glazing.

[dazmond]

Sunny days don't affect the clean it just shows up the poor power of wfp.

there you go again mr negative!

if WFP was that bad we would of all been sacked by now and  be signing on.

do you know just by having little faith in WFP that you can make the windows SEEM dirtier than they are?

[jonboywalton75]

Fan jets can do this also this is the reason I never use them,spots galore I used to get with fan jets they put water everywhere except where you want it

Not if you rinse on full bore.

Fire hose is better

[NWH]

Nathan I used Vision and it does help with the cleaning of frames and windows but I won't use it anymore as it ruined 2 of my pumps,2nd 000ppb water does clean better and I couldn't give 2 hoots what any other cleaner says. If you use ppb water on glass that beads up you can see within seconds the difference it makes,you get a minimal amount of water left on the glass as soon as you lift the brush off the glass compared to using regular resin. The selling point they try to use is dirt absorbtion rate,to me this is science and many think rubbish as did I,the thing is I can tell the difference on work I do the amount of water left on the glass within a minute of cleaning it. I challenge anyone to have a go with ppb water and see for thereselves.