Absolutely could be a clouded windshield on the inside (where it's really hard for normal people to clean). I brought this up when I got my last Model Y that it was foggy and they said it was "fine". Took it into service over a year ago and noticed they cleaned it. Clearly it's a problem but they're not being too transparent about it. I suspect they don't want to because it's not the easiest thing to remove the cover for normal people to clean.