The xenon/argon leakage isn't the real issue. It's cold air getting into the gap between the panes so the warm air hitting the inner pane is hitting a colder surface and condensing. When the EPC is used for everything, and inappropriately so, people expect it to do more than it does or ever could

Oh I thought that condensation on the inside of both panes was because the seal had gone. The gap between the pain is meant to be filled with dry gas right? This is what I mean