Hi everyone,A couple of years ago I had a Only fools and Horses moment as I was asked to clean the inside stain glass widnows of a 12c church. We did this with the WFP system with as little water as possible while the warden man moped up the water. The Church now want the exterior stain glass windows cleaned. Has anyone had experience of cleaning stain glass windows without soap etc. Not sure they have been cleaned for a few hundred years!!!