Customer has accused us of scratching their glass on an upstairs window. She noticed it today whilst the sun was shining bright on the glass. For reference we have cleaned for this customer for 2 years, but at her new property only about 6 months now.
Last time a customer accused us of scratching glass this happened was 2021. I usually get this once every couple years.
I came to the conclusion years ago that it's not possible to scratch glass using standard wfp. We don't use razor blades or anything abrasive for window cleaning. We just use standard wfp brushes.
So based on that alone, this is the standard reply i send whenever a customer accuses us of scratching the glass.
I am not even willing to entertain the possibility that we have caused it because i just don't see how its possible to scratch glass with wfp, especially when its more than 1 scratch, lots of long ones almost like someone has used a stanley blade on the glass at some point.
Let me know what you think of my approach and also my reply.
Dear Customer,
Many thanks for communicating with me with the issue of the scratched glass, I am sure that you must be concerned about this matter on your property.
First of all I would like to assure you that the methods we use and have used on your property since 2021, along with the specialist brushes selected for your windows, are chosen so that it is not possible to scratch glass of any sort, whether new glass or skylights.
The brushes are made by a specialist company who have been supplying them to the WFP window cleaning industry for over a decade now and are made using PBT polyester bristles and nylon stocks. Both materials are not hard enough to scratch glass in use. They are also designed not to hold on to grit or stones in cleaning.
We do not believe we have caused this scratch due to the high quality tools and standards we use.
However we have found that sometimes scratches have been caused by other work done nearby or general house or garden maintenance and then not noticed for many months or even longer years until a bright day when the sun strikes it from a certain angle.
Because imperfections may be imperceptible in dull conditions and the window is often dirty due to weather this might go unnoticed until a sunny day after the windows have been cleaned.
Therefore, in view of the above my operative did not cause the scratches to your glass.
Yours Sincerely