I inadvertently sprayed 409 multi purpose cleaner on the inside of the rear window while cleaning the headrests; didn`t realize it for several days. Now it has spots that I can`t get off. It seems the cleaner has penetrated into a coating. I tried the same 409 to no good, and several others including all the glass cleaners I have. The glass has defrost wires on the surface so I have a concern that using steel wool will ruin it. I will be greatly appreciative to receive your thoughts on how to get the glass clean again. Thank you.
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