Hey all, did what was supposed to be an easy under one hour job, cleaning 50 total french window panes. However, it took me nearly 2 hours because the windows were so dirty with what appeared to be hard water. It certainly acted the same way as hard water, the soap just wasnt super effective. I had to basically wash each window 3 times, while also using bronze/0000 steel wool, and the detail work was so tedious.
What would cause hard water up there? I told the owner and he basically said he had never heard of hard water on windows, though he thought I did a good job (thankfully)
Any thoughts, havent dealt with hard water in window cleaning before. Crap sucks.