I can't answer your question, but what I will say is that I used to wear Dye I3's and I3 Pro's, and always always steaming them up unless I had the fan running. I have swapped to e-vents since, and as long as I use the double pane lens I never have a problem.
Have you tried the stuff that motorcyclists use? I cant remember its name but its green and it comes in a squirty bottle. Its really good. try your local motorcycle dealership...