Can't say that I've noticed that in mine.
But hardly have my windows down, as where I live ... I'd be spat on at every traffic light, when the auto wipe scares the **** out of the deaf and persistent window cleaner that can't take "No" for an answer.
But see if having the sunroof left on tilt or front passenger window down a bit or all the way, helps?
Worse case, you can buy some tinted wind deflectors off eBay for the Tig.
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