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Discussion Starter #1
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:
https://www.amazon.com/No-Touch-Auto-Glass-Stripper/dp/B000COBXFU/ref=sr_1_1?ie=UTF8&qid=1477672417&sr=8-1-spons&keywords=no+touch+gs8&psc=1

Glass Cleaner:
https://www.amazon.com/DRIVEN-Extreme-Duty-Glass-Cleaner/dp/B0021YZER2/ref=sr_1_1?ie=UTF8&qid=1477672462&sr=8-1-spons&keywords=driven+extreme+duty+glass&psc=1

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.
 

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Discussion Starter #4
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.

Thanks!!!
 

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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.
 

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Discussion Starter #6
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.
 

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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.
 

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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.
 

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Discussion Starter #12
Thanks everyone for your thoughts. I will hopefully have time to try some things this week but I have to prepare the Mustang for winter as well. I will update the thread on what I find. I guess I'll start with vinegar because that's cheap and easy to get and I would like to experiment while I'm at it.

I still want to try the glass cleaner I linked in the OP because I am very curious about that stuff. It's expensive though being $20 for the bottle so I can't decide if I want to go that route.

And I guess it turns out Seiya put the spots on my windshield with his magic attack.
 

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Discussion Starter #13
I had time to try removing the spots from my windshield. I decided to use a product I found on Amazon. It was a little more expensive but I wanted to experiment a little. I attached a photo of the product I used.

I found out that if I blew hot air onto my windshield, I could see the little dots pretty well. After rubbing the crap out of my windshield I blew on the windshield again and no dots! I will make sure they are completely gone throughout the next few days due to every morning being so cold they show up very easily. If it goes how I think it will, the product worked great!
 

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Discussion Starter #16
I have attached photos of my windshield this morning. A lot of moisture was built up on it and there are no dots. This makes it much easier to see out of if it starts to fog up at all. I'm very happy with the results and the ease of using the acid gel. It smelled good as well.

I'm sure there are many other ways to remove the dots and I wish I felt like spending the money and trying out a bunch of different products but sadly I do not. Luckily the first one I did try worked great.

I'll be trying rain x on my windshield for the first time in the winter. It says it helps with snow and ice but I have never tried it so I will soon find out. If it doesn't do well, I will remove the rain x with my new acid gel!
 

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My thoughts on Rain X...I use it on my rear window, but not on my front windshield. It is awesome when it's fresh, but I find it to be worse than an untreated windshield when it starts to wear off over time. It gets streaky and smeary...almost like when your windshield gets foggy on the outside on cool/humid mornings. Living in rainy Seattle, I prefer to have a nice clean windshield and fresh wiper blades without any treatment on the windshield. Water doesn't bead off like it does with Rain X, but it doesn't smear either.
 

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My thoughts on Rain X...I use it on my rear window, but not on my front windshield. It is awesome when it's fresh, but I find it to be worse than an untreated windshield when it starts to wear off over time. It gets streaky and smeary...almost like when your windshield gets foggy on the outside on cool/humid mornings. Living in rainy Seattle, I prefer to have a nice clean windshield and fresh wiper blades without any treatment on the windshield. Water doesn't bead off like it does with Rain X, but it doesn't smear either.
This is a good observation. I love Rain X right after it is applied. Not so much when it starts wearing off.

Another thing I read in the OM: Application of "Rain X type" products may interfere with the operation of automatic wipers on vehicles so equipped. YMMV.
 
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