Hot water - Cold glass

I have never try this But I think There Will be definately Some changes Occur,I’ll try and Check Let’s see What Happen

Me neither. I’d imagine it has to be a pretty dramatic dif in temps for newer gas windows. I could see some of these really old single pane, lead-based windows from the 60’s I’ve cleaned in the past doing it. I can feel the glass wiggle as I clean’em they’re so thin.

How long have you been a member at MWCoA, Steve?