One of the houses where I clean windows has leaded windows. Problem is on the side of the house where there are only 2 windows there are smear marks coming down from the lead. I have only cleaned here for the second time today but gave these 2 windows 2 cleans each and rinsed and rinsed. After they had dried I got the ladder out and climbed up to take a closer inspection. It would appear that the smear marks are coming from the lead and even close up I was not able to remove them completely. It's almost as though the marks have impregnated the glass.
My customer is not holding me responsible after all, all I did was clean them with pure water and nothing else, however I'd like to know if others have encountered this problem and if there are any ways of resolving the problem.
I suspect that the lead has become contaminated from a chemical in the air sometime and now this contamination mixed with the pure water is possibly causing the smears. Otherwise why dont I get the same promlem on the other 3 sides of the house?
Any ideas??