Also, I should acknowledge that there are probably a few different brands/manufacturers of these products, so perhaps others have had better luck.
I'm not sure which brand was on my car, as the paperwork (that came with the vehicle) provides no indication.
Perhaps if you change-out the film every two years; you might avoid the clouding/fogging. My car is a 2013 and I have to believe that the film was installed by the original dealer.
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