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Bosh 10-28-2016 12:48 PM

Windshield Spot Removal
2 Attachment(s)
I have put roughly 2000 miles onto my 2016 M6 and I bought it with about 200 miles on it originally. Ever since I have owned it, there have been these 'spots' that appear on my windshield when it rains or my windshield gets slightly foggy. They would visually just come and go pretty quickly up until it started getting cooler out. I live in Wisconsin so we're just getting started with the cool weather. These spots make it slightly more difficult to see since they appear and fog up so easily. I don't know what they are or if other people have ever had this issue before but I would like to get them removed before real winter sets in.

I have done some research on this and came up with a few things but wanted to pass it by others and see what other fixes there could be.

Some ideas of what I will try:
Glass cleaner:

Glass Cleaner:

Another option I have heard is to use a clay bar and rub the crap out of the windshield.

Any ideas? I have attached photos of what the spots look like. They're roughly the size of my index finger nail and they're all over.

MadStyle 10-28-2016 04:00 PM

Seems like Ice crystals beginning to form, not going to get rid of them, It's weather related.

GerryB 10-28-2016 05:52 PM

Are these spots on the inside or the outside?

Sent from a Samsung that doesn't explode.

Bosh 10-28-2016 09:02 PM


Originally Posted by GerryB (Post 4770554)
Are these spots on the inside or the outside?

Oh yeah, sorry I forgot to specify this. The spots are on the outside.

I don't believe it is ice crystals because this has been happening since the summer when it was 70s and 80s outside. If it would rain at all, they would sometimes start to appear.

I don't know if VERY new cars sometimes have a plastic film they put over the windshield during transportation at all and it left little dots? I think I will try one of the window cleaners I linked in the OP and see if that helps at all.

Any additional ideas and question are still great so I can hopefully get to the bottom of this.


GerryB 10-28-2016 09:48 PM

Griot's garage makes a glass cleaning clay. You can try something like that, then Rainx the window. It seals the surface with a polymer and should help a lot.

Sent from a Samsung that doesn't explode.

Bosh 10-28-2016 10:51 PM

I'll add that to the list of things to try, thanks.

I should add that in my photos, that is all water and not ice across my windshield. It was upper 30s, low 40s the morning that I took the photos. The spots don't 'scrape' off, they rub off. Once it sits for a bit or more water gets on the spot that I rubbed, the spots appear again.

While typing this I thought of another experiment I should try. I might try marking where some of the spots are and rub them off. Then see if they always are in the same spot. If they are in the same spot every time, it should be safe to conclude that there is something on my windshield.

GerryB 10-28-2016 10:54 PM

Glass clay should help get those deposits off of there.

Sent from a Samsung that doesn't explode.

chutoyy 10-28-2016 11:33 PM

Yeah.... I think almost all new cars have the residue... I think it's a mold release thing or offgassing of the laminate (no idea).

Best way I found that gets rid of that stuff (and the windshield wiper park lines) is to take a wool or abrasive cutting pad and a rotary buffer on high speed, then polish out the glass with a cutting compound.

I use a Flex buffer with an orange Lake Country Pad w/ Meguiar's ultimate compound on speed 4-ish.... Then I rub some wax on it.

Kirby34 10-29-2016 07:50 AM

Initially, I was going to say that it looks similar to what I had on my moonroof glass, but looking closer at your pictures, I'm not so sure. In my case, I think it was etched water spots from the water left sitting by those guys who "wash" the cars sitting in the dealership lot. I tried glass cleaner, vinegar-water solution, claybar, #00 steel wool, but the thing that finally worked was what chutoyy mentioned - Meguiar's Ultimate Compound. Though I did manage to remove the stains by hand without having to break out the Porter Cable DAP - that would've been my next step.

Seiya 10-29-2016 06:55 PM

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