I had this problem with the laminated glass in my house windows. Some of the glass was fitted without the correct sealant putty and has gone milky at the edges just like car glass, so sealing seems to be a requirement to keep the glass from going white and presumably if you can get the milkiness out then you have to seal the edges with something.
If you can get the moisture out then the milkiness will disappear according to a paper I just looked up but I would have thought heating the glass would only drive the moisture further into the EVA making the problem worse. I wonder if applying a silica gel to the edge would be more effective in drawing the moisture out? Or a stick it in a space with a dehumidifier?
My neighbourhood looks better through milky glass so I have left it as is
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