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Couple of suggestions;

Take your vehicle to a windscreen specialist to assess if there is a manufacturing defect with it.

Get the glass professionally cleaned, ,unfortunately, getting the glass 100% streak free is my Achilles Heel when detailing my vehicle. If that does the trick, find out what products, or procedure they use to achieve it. Every day is a school day!

I used rubbing alcohol (isopropyl 70%) to remove the sticky residue from a previously applied window tint, which may be worth a bash.
 

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Discussion Starter · #22 ·
The only thing that I've used thus far, on the inside, is Windex and it's not helping much at all. Take note that it only does this in cold weather, if it's above 70 degrees Fahrenheit it doesn't do it.
 

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All summer the muck did not show itself but now that it’s the fall season the muck is back if the temperature outside is 70° or less.
Do you keep the A/C on all year round, or switch it off during cold weather/winter?
 

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I would skip the Magic Erase part because those have some micro abrasive compounds which could possibly scratch the glass if you push too hard,
I use a Magic Eraser to clean the inside of my fish tank, if it ever needs cleaning, I never got any scratches from it.
The only scratches I do have, came from those magnetic glass cleaners sold for cleaning fish tanks. That is why I now use the Magic Eraser if I need to clean the inside glass at all.
I reckon a cars window glass would have a harder surface than a fish tank.

YMMV.

P.S. I forgot to add that I have used the Magic Eraser on my windows too.
 

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The only thing that I've used thus far, on the inside, is Windex and it's not helping much at all. Take note that it only does this in cold weather, if it's above 70 degrees Fahrenheit it doesn't do it.
Mine does the same. The film is actually always there in a sense. But when it's colder, the interior condenses ever so slightly sometimes and what you're seeing is a slight fog sticking to the grease film. Try turning on your front windshield defroster to see if it clears up.

I've also found that there's always air blowing through the windshield vents regardless of if you have it on internal circulation only and vents aimed at the feet. Because of this, the film builds up inside within a month or so and I have to keep cleaning it.

But a pro tip that I've found to be useful. When you get that slight fog on the windshield, or if it just seems greasy, use it to your advantage. Park under a street lamp at night (this really brings out the grease film) then run your finger on the glass to create a "streak" so to speak. If the streak you made it clearer than the other parts of the windshield, then its time to wipe if off. Since theres fog build up on it, the added moisture acts like if you puffed your breath on a camera lens to wipe it clean. Now just get a dry paper towel, or even some napkins from McDonalds, and wipe your windscreen. You may find that it gets clearer, if so, repeat for the rest of the windshield. No windex, or glass cleaner required.

That has been my secret "upkeep" technique between full windshield interior washings. I hate greasy, film on my windshield just as much as you so I feel your pain. I actually keep napkins in my car from all the fast food joints and when the film gets bad enough, I'll sometimes wipe it down while waiting at a stop light (make sure to put it in park first. lol).

I've also come to find that window cleaners seem to make it worse sometimes. It's almost like the cleaner spreads the grease around more, like butter. But the dry towel/napkin technique seems to act as a "sqeegie" and pushes the grease off to the corners.

Hope this works for you.
 

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Discussion Starter · #28 ·
I tried the fast food napkins and it's just not doing enough. It would take several passes and a lot of work to cut through the layers. I'm going to get a microfiber cloth and try that next. Now that it's fall/winter it is showing a lot and it's difficult to see out of the car.
 

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It may be worth taking it to the dealership you purchased it from and see if the issue is due to something they are doing during the PDI.

My previous vehicle was a factory order, when I went to collect it there was a paint, glass and fabric top up kit in the boot. When I pointed out to the salesperson that was not one of the options I had selected he informed me they had either treated the car as a freebie or had just given me a spare top up car wash kit that was lying around. I have no idea if they actually did apply the stuff prior to collection, however, cleaning glass streak free has always been my Achilles Heel when cleaning any of my cars, but not to the extent you are experiencing.
 

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Discussion Starter · #30 ·
Another factor, the moment we get out of the car it clears up and the moment we get into the car is starts to fog up again. Maybe I should just hold my breath.
 

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Another factor, the moment we get out of the car it clears up and the moment we get into the car is starts to fog up again. Maybe I should just hold my breath.
I'll time you.....

Give me a sec whilst I reread all the responses to this thread before I comment....

Right finished. Try using a glass cleaner with defog properties. I find using a glass polish - it turns powdery as it dries - better at removing dirt and so on from the windscreen.

I would keep the A/C on, and when the 'muck' starts to appear either put the vents in the demist windscreen position, or feet and windscreen and see if that helps. You may have a window or door seal leak somewhere (I had one in my previous vehicle due to dealership having to realign both front doors due a buzzing noise at speeds in excess of 50mph), try placing a dehumidifier bag (I used a re-usable microwave version) and leave it on your dash when parked up during cold weather. If that works your next mission is to locate the leak.
 

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If it fogs up that easily, do you have the defroster on? also not on re-circulate, this would help with the fogging, the dirt or film is still on the glass but reduces the condensation
 

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Discussion Starter · #33 ·
The top photo is 52° F at 8 am and the film was on the outside, no amount of wiping or spraying would clear it. The bottom photo is 58° F at 9 am and the fog is on the inside, the defrost (cold) will clear it but burrr it gets cold inside the car. This concludes today’s muck report.
Car Vehicle Sky Plant Mirror
Car Motor vehicle Sky Automotive mirror Hood
 

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The first image appears to be down to either the wiper blades not being in constant contact with the windscreen, or a weak windscreen fluid solution - more water than screenwash, or a combination of both.

Not saying this is best practice, but for the environment I live I change my windscreen wipers twice a year; at the end of spring, and the end of autumn. I start ramping down and up the type of screenwash I use around the same time; weaker going into summer, and stronger heading into winter. There has been an approximate 10C temperature drop over the last week.

The second image appears to be my Achilles Heel, I very rarely get a streak free finish whilst using a liquid glass cleaner. I obtain better results with a glass polish which goes powdery when it dries - typically I've just bought a 5 litre container of water and fog repellent liquid glass cleaner . It may also be down to the type of cloth you use to wipe the glass. I found I got better results using an Autobrite The Enforcer Glass Towel (usual caveate - I'm not recommending them, just showing you an example of what I mean) I also use a waffle weave glass towel similar to Chemical Guys Waffle Weave Glass Towel which I attach to a Windscreen Cleaner Thingy! to ensure I reach all the nooks and crannies.

When using the liquid glass cleaner it normally takes me several attempts to get as near as damn it (no offence, Dammit) streak free finish.
 

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The top photo is 52° F at 8 am and the film was on the outside, no amount of wiping or spraying would clear it. The bottom photo is 58° F at 9 am and the fog is on the inside, the defrost (cold) will clear it but burrr it gets cold inside the car. This concludes today’s muck report.
View attachment 32852 View attachment 32853
Ah, I get the exact same thing. Theres 2 solutions I use, one for the outer screen and one for the inside when the muck is that bad.

The Outer Screen:
Lift the wiper blades up and inspect the rubber wiper. See if its cracked, has missing portions, or has torn a bit from its base and is dangling a bit. If any of just mentioned. Replace the blades. (NOTE* The wiper blade is factory OEM and you can get replacement rubber strips for it. They just slide in and out of the Blade. DONT throw away the wiper blade!) Or you can just replace the whole wiper blade with a complete replacement from Walmart or something. Either way works, but don't throw away your OEM one.

If the rubber is intact, then get a paper towel (or any clean towel). Spray some car glass cleaner onto the towel. Then wipe the rubber portion of the blade. If the towel has a dark black streak on it after wiping, thats your problem. The blade was dirty and just spread the gunk instead of wiping it off. Just wipe it until the towel has no more black streaks and they will work like magic again. Makes a HUGE difference.


The Inner Screen:
What sucks about cleaning the inside is that you can't spray it with a hose to rinse off the muck. The only way the muck will come off is by being absorbed on the towel that you use. With that said, towels will get coated with the muck after a few wipes and you will now only be spreading the muck instead of cleaning it. Thats what makes the inner side so hard to clean.

When it gets that bad, I'll go buy some car windshield wet wipes (find one with moistest towels, sometimes the pop open top ones will dry out on the shelves). Then divide the inner shield into quadrants (Top right, bottom right, top left, etc) Then focus only one one quadrent and wipe and replace wet wipes until it's clear. I'll usually use about 3-4 wipes per section, I throw them away after a few wipes on each side to avoid spreading muck. The bottom of the screen is the worst as its right by the air vent and gets the brunt of the mucky air. So I usually go through 6-7 wipes sometimes for the bottom quadrants.

Work from the top of the screen to the bottom. You definintly dont want the muck at the bottom spreading to the top of the glass.

Then I'll finish it off with some glass specific microfiber cloths. I use the blue turtle wax glass towels from target. If it's a warm day and the glass cleaner liquid has dried on the glass, then just dampen the microfiber with a tiny tad of glass cleaner spray. Just enough to wipe off the streaks, but not too much as to get the screen wet again.

It's a very tedious and tiring process. Emphasis on the tedious. That's why I just use my napkin technique in between deep cleans cause it takes forever. But it's really the only way if you want a perfectly clear screen.

But what annoys me about the HRV is that there is always a bit of air circulating to the windscreen even when you set it to floor only and internal circulation. So I have to clean it much more often than my old Camry which didn't blow any air to the windshield when set to floor.

Oh, and don't use any cleaners or conditioner sprays on the dash (ie. the stuff from Meguires, Mothers, etc) if you want to minimize windshield cleaning. Those products tend to outgas fumes which end up sticking to the windshield. I have to admit though, I still use them on occasion because I love the clean look of a smooth black dash top, but I also prepare myself for the headach to come with cleaning it off the windshield. 😅😵‍💫

Hope this helps!
 

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Oh, and don't use any cleaners or conditioner sprays on the dash (ie. the stuff from Meguires, Mothers, etc) if you want to minimize windshield cleaning.
Hope this helps!
If you like a nice clean dash try using Aero303, but don't spray it directly onto your dash, use a clean cloth to apply and buff.
Aero303 is what they use on the top of the dash in aircraft.
 

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If you like a nice clean dash try using Aero303, but don't spray it directly onto your dash, use a clean cloth to apply and buff.
Aero303 is what they use on the top of the dash in aircraft.
Hmmm. I'll look into that. I do like that smooth black surface. lol. Thanks!
 

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The temp of the defrost is based on the cabin temp setting, if it is cold, set it higher. This will be cold no matter what with a cold car but should warm up in a couple of minutes
 

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Discussion Starter · #40 ·
Have you tried using newspaper when you clean the inside (or outside) of the windows?
I've tried various paper(s) on the inside but not newspaper. The outside goes through the automatic car wash.
 
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