EXPANDABLE HOSE PIPE

I concur with the rest of your comment, but not this bit. You get the same thing on the windscreens if very very old cars, where there is no significant leaching. I think it is caused by traffic fumes, tyre dust and chemicals from outside.

However plasticiers are a serious issue. That 'new car smell' is mostly toxins.
I always used to get a film on the inside of my car windscreen 30+ years ago. I put it down to 40 Marlboro a day and a lengthy commute.
 
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