To all WFP users,
Yes, its impossible to scratch glass with any wfp manufactured in the UK, some are plastic and some have aluminium components on brush head.
Aluminium is softer than glass therefore cannot scratch, the only way glass can be scratched is if a brush head had fallen on ground and got dirty. so if this ever happens make sure you brush is clean before starting the clean.
In commercial circles, its generally the archietects or building site managers that blame the window cleaners for scratching glass, this was proven a few years ago in court where it was demonstrated that the brush cannot scratch glass, the point being proven, it was throw'n out of court, but they will always try and blame you or your workforce. Stand up to these morons and say take me to court cos you will not win, ive seen this happen too often, the glass was already scratched before the window cleaners arrived. this happens mainly at builders/fisrt cleans. so don't be soft and stand your ground.