[john@windows2clean]

I have also had a couple of customers in the last 12 months suggest that the wfp had made the seals go.  I just tell them its highly unlikely and that it happens to all units eventually however they are cleaned, then give them a card for the local window repair company.  I do like Matt's idea of having a small unit to show them, will get that sorted next week and keep it in the van.

[sean c]

i've got to replace a window on a job the guy is 100% the brush has mad the sealed unit fail it's a large block monthly so i've got to suck it up . we all no it rubbish

[AuRavelling79]

i've got to replace a window on a job the guy is 100% the brush has mad the sealed unit fail it's a large block monthly so i've got to suck it up . we all no it rubbish

You've made a rod for your own back. Every blown sealed unit will be "your fault". Madness!

[Trev Jones]

It baffles me how anyone can possibly think that WFP can cause a double glazed unit to fail. The two pieces of glass are sealed together and air tight and filled with an inert gas and then to top it off the black rubber seals also prevent water getting in to an already sealed unit. How a soft brush agitating the dirt on the glass make water ingress past the rubber seal (possibly maybe, at times), but then to ingress into the glass vacuumed sealed unit makes it very improbable unless jet washing windows.
Actually paying for someone's new window is crazy, do some research, print it off, hand it to them, take them of your list and point them in the direction of their window suppliers and leaflet drop or canvass to replace them:)

Oh and read this
http://en.wikipedia.org/wiki/Insulated_glazing

[EandM]

i've got to replace a window on a job the guy is 100% the brush has mad the sealed unit fail it's a large block monthly so i've got to suck it up . we all no it rubbish

I fear that taken to it's logical conclusion this will ensure bankruptcy...

[formb]

i've got to replace a window on a job the guy is 100% the brush has mad the sealed unit fail it's a large block monthly so i've got to suck it up . we all no it rubbish

Eh?
¿Que?

If you know, and he knows that it's rubbish why are you paying?

[SB Cleaning]

i've got to replace a window on a job the guy is 100% the brush has mad the sealed unit fail it's a large block monthly so i've got to suck it up . we all no it rubbish

You must .be joking 

[dave f]

buy replaceing you are addmitting your at fault why would you do that if you know its rubbish its beyond me.youve left your self wide open to claims next it will be youve scrached all my windows are you gonner replace those as well.im not having ago at you but you have to be on the ball at all times imo.