# How to clean car windshield? **URL:** \ **Category:** Factual Questions\ **Created:** [June 7, 2011, 12:50am UTC](https://boards.straightdope.com/t/how-to-clean-car-windshield/584571 "2011-06-07T00:50:52Z")\ **Posts on this page:** 19\ **Page:** 2
**Author:** ![Chefguy](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/chefguy/32/138_2.png) [@Chefguy](https://boards.straightdope.com/u/Chefguy)\ **Post date:** [June 7, 2011, 1:31pm UTC](https://boards.straightdope.com/t/how-to-clean-car-windshield/584571/21 "2011-06-07T13:31:03Z")
> [@Grateful-UnDead](#): > > I took it back to the dealer, but they said: “New cars do that; it will go away.” > > They checked the radiator, head gaskets etc, etc. They found no mechanical problem, but they did agree that it is a combination of off-gassing and road film passing through the ventilation system. > > I tried Armorall, and it didn’t touch it. > > I haven’t tried lighter fluid, but sounds like it could be a fun thing to do. Could entertain the neighborhood too! They did all that, but didn’t offer to clean it off? I’d go back and tell them you want it removed or you want a new windshield. Take it to the ownership, if necessary. This is clearly some mutant funk. The products you’ve tried should have cleaned it up. ---
**Author:** ![Dewey\_Finn](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/dewey_finn/32/4222_2.png) [@Dewey\_Finn](https://boards.straightdope.com/u/Dewey_Finn)\ **Post date:** [June 7, 2011, 2:26pm UTC](https://boards.straightdope.com/t/how-to-clean-car-windshield/584571/22 "2011-06-07T14:26:32Z")
If it’s not too late, make sure to note your dissatisfaction when you get the survey call from the car manufacturer. I bought a car last year, and I got the impression that the dealer really, really wants you to say good things about them when the manufacturer calls. (I think the call is about a month after you get the car.) Also, try calling the manufacturer directly. ---
**Author:** ![Arrendajo](https://avatars.discourse-cdn.com/v4/letter/a/e0b2c6/32.png) [@Arrendajo](https://boards.straightdope.com/u/Arrendajo)\ **Post date:** [June 7, 2011, 5:55pm UTC](https://boards.straightdope.com/t/how-to-clean-car-windshield/584571/23 "2011-06-07T17:55:30Z")
> [@don\_t\_ask](#): > > I use [Rain-X 2 in 1](http://www.rainx.com/Products/Windshield_Treatment/2_In_1.aspx). If you use it a couple of times to clean the windows you can then carry it around and spray it on whenever it is raining. If it doesn’t rain for weeks spray it on in the morning, throw over a jug of water and run the wipers. Works like a charm. I think the OP is talking about cleaning the **inside** of the windshield. I had a problem with this after I bought my new Honda Fit. The problem was exacerbated by the sharp slope of the windshield and the large shelf-like dash area. I simply couldn’t reach the inside of the windshield very well to clean it. I got it clean OK with Windex and paper towels, but it was really awkward. The problem lessened over the next year or so and now I don’t need to clean it so often. The slope of the windshield also makes the film more obvious and annoying; if it were more vertical it wouldn’t be as big a problem. I found the ArmorAll glass cleaner wipes didn’t work any better than Windex and paper towel. I finally bought one of those microfiber pads on a stick (as advertised on TV!) so I could reach the inside windshield without contortions. ---
**Author:** ![gallows\_fodder](https://avatars.discourse-cdn.com/v4/letter/g/8c91f0/32.png) [@gallows\_fodder](https://boards.straightdope.com/u/gallows_fodder)\ **Post date:** [June 7, 2011, 6:05pm UTC](https://boards.straightdope.com/t/how-to-clean-car-windshield/584571/24 "2011-06-07T18:05:15Z")
Why steel wool on glass? ---
**Author:** ![kenobi\_65](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/kenobi_65/32/13178_2.png) [@kenobi\_65](https://boards.straightdope.com/u/kenobi_65)\ **Post date:** [June 7, 2011, 6:38pm UTC](https://boards.straightdope.com/t/how-to-clean-car-windshield/584571/25 "2011-06-07T18:38:06Z")
> [@salinqmind](#): > > 1. I was driving at night and something, I have no idea what, hit my car windshield. A big bug? It made a real ‘splat’ and the next morning I saw blood in a big streak across the glass. I washed it off. Surprise, there is still a white streak of something on the glass, and it’s like etched in the glass. I looked at it in daylight and scraped it with my nail, and nothing came off, it’s like etched with acid. Any ideas of what hit my windshield, how to get it off? Weirdest thing… Are you in the South? It sounds like it might be the remnants of a “[lovebug](http://en.wikipedia.org/wiki/Love_bug)”. Their “splats” tend to leave a white mass (I think it’s the female’s eggs), and are acidic; they can etch paint or glass if left on the car for a while. We were driving with my father-in-law in Florida (in his brand-new car) about 6 weeks ago, and it turned out to be lovebug season in the Tampa area. He was pretty upset about it, and, as soon as we got back to his house, he immediately scrubbed all of the dead bugs off of his car. ---
**Author:** ![salinqmind](https://avatars.discourse-cdn.com/v4/letter/s/3ec8ea/32.png) [@salinqmind](https://boards.straightdope.com/u/salinqmind)\ **Post date:** [June 7, 2011, 9:48pm UTC](https://boards.straightdope.com/t/how-to-clean-car-windshield/584571/26 "2011-06-07T21:48:21Z")
No, I’m in the Northeast, no lovebugs that I know of… It’s the darndest thing, no one I’ve asked has any idea what caused that splat. I’m going to try rubbing a just a corner of it with steel wool. I know it’s not a good thing to do, but it’s right in my line of vision. ---
**Author:** ![Dewey\_Finn](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/dewey_finn/32/4222_2.png) [@Dewey\_Finn](https://boards.straightdope.com/u/Dewey_Finn)\ **Post date:** [June 7, 2011, 10:01pm UTC](https://boards.straightdope.com/t/how-to-clean-car-windshield/584571/27 "2011-06-07T22:01:01Z")
How about going to a local, independent carwash or detailing firm? Presumably they have experience with all sorts of stuff. ---
**Author:** ![Grateful-UnDead](https://avatars.discourse-cdn.com/v4/letter/g/ccd318/32.png) [@Grateful-UnDead](https://boards.straightdope.com/u/Grateful-UnDead)\ **Post date:** [June 7, 2011, 10:02pm UTC](https://boards.straightdope.com/t/how-to-clean-car-windshield/584571/28 "2011-06-07T22:02:08Z")
> [@Arrendajo](#): > > I think the OP is talking about cleaning the **inside** of the windshield. > I had a problem with this after I bought my new Honda Fit. The problem was exacerbated by the sharp slope of the windshield and the large shelf-like dash area. I simply couldn’t reach the inside of the windshield very well to clean it. I got it clean OK with Windex and paper towels, but it was really awkward. The problem lessened over the next year or so and now I don’t need to clean it so often. The slope of the windshield also makes the film more obvious and annoying; if it were more vertical it wouldn’t be as big a problem. I found the ArmorAll glass cleaner wipes didn’t work any better than Windex and paper towel. I finally bought one of those microfiber pads on a stick (as advertised on TV!) so I could reach the inside windshield without contortions. Yes, correct. In my car (Ford) the angle of the windshield doesn’t seem to be the issue; the film is more or less evenly distributed over the entire inside surface, and while awkward is generally accessible. Of course, my attempts at cleaning it have spread it around a lot as well. I went out earlier after reading some of the posts above, and bought a collection of commercial cleaners and a microfiber cloth. Nada…! Are you guys serious: use steel wool on glass??? That would scratch the glass so much that I wouldn’t be able to see through it anyway. Or are you just joshin’ me? ---
**Author:** ![ZenBeam](https://avatars.discourse-cdn.com/v4/letter/z/3ab097/32.png) [@ZenBeam](https://boards.straightdope.com/u/ZenBeam)\ **Post date:** [June 7, 2011, 10:07pm UTC](https://boards.straightdope.com/t/how-to-clean-car-windshield/584571/29 "2011-06-07T22:07:50Z")
> [@Chefguy](#): > > They did all that, but didn’t offer to clean it off? I’d go back and tell them you want it removed or you want a new windshield. Take it to the ownership, if necessary. This is clearly some mutant funk. The products you’ve tried should have cleaned it up. Yeah, WTF? They didn’t at least clean it once? I’d be wary of using steel wool. I’d try a plastic scrungy\* pad used for cleaning teflon pans first. Those should be safe for glass (maybe fine enough steel wool is too, but I’d use the plastic one first anyway). - pardon the technical language. ---
**Author:** ![Grateful-UnDead](https://avatars.discourse-cdn.com/v4/letter/g/ccd318/32.png) [@Grateful-UnDead](https://boards.straightdope.com/u/Grateful-UnDead)\ **Post date:** [June 7, 2011, 10:17pm UTC](https://boards.straightdope.com/t/how-to-clean-car-windshield/584571/30 "2011-06-07T22:17:40Z")
> [@ZenBeam](#): > > Yeah, WTF? They didn’t at least clean it once? > > I’d be wary of using steel wool. I’d try a plastic scrungy\* pad used for cleaning teflon pans first. Those should be safe for glass (maybe fine enough steel wool is too, but I’d use the plastic one first anyway). > > - pardon the technical language. Yes, they did try; and failed. Ditto with a commercial cleaner. But the hassle factor is too great to keep at either the dealer or a commercial cleaner. It is less aggravating to try to fix it myself when I have odd moments. I prefer that the little molecules do their thing on the glass before I start using any kind of abrasive. Besides which, the problem is not one that requires an abrasive; Ie: the white film smears around pretty easily, it just won’t lift off. So an abrasive wouldn’t make any difference, other than scratching the glass. ---
**Author:** ![Dr.Strangelove](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/dr.strangelove/32/6613_2.png) [@Dr.Strangelove](https://boards.straightdope.com/u/Dr.Strangelove)\ **Post date:** [June 7, 2011, 11:05pm UTC](https://boards.straightdope.com/t/how-to-clean-car-windshield/584571/31 "2011-06-07T23:05:03Z")
> [@Grateful-UnDead](#): > > Are you guys serious: use steel wool on glass??? That would scratch the glass so much that I wouldn’t be able to see through it anyway. Or are you just joshin’ me? I can’t give you any first-hand information, but there’s nothing inherently wrong about it. To a first approximation, you can’t scratch a hard substance with a softer one. Steel is softer than glass, so it should abrade away contaminants without actually scratching the glass. Of course the real world is more complex, and I couldn’t guarantee that all the oxides of iron or the common contaminants of steel wool aren’t harder than glass. I couldn’t recommend aluminum for the same purpose, for instance, since even though aluminum is much softer than glass, it quickly oxidizes to corundum, which _is_ much harder than glass. ---
**Author:** ![ZenBeam](https://avatars.discourse-cdn.com/v4/letter/z/3ab097/32.png) [@ZenBeam](https://boards.straightdope.com/u/ZenBeam)\ **Post date:** [June 8, 2011, 12:06am UTC](https://boards.straightdope.com/t/how-to-clean-car-windshield/584571/32 "2011-06-08T00:06:30Z")
> [@Grateful-UnDead](#): > > Besides which, the problem is not one that requires an abrasive; Ie: the white film smears around pretty easily, it just won’t lift off. So an abrasive wouldn’t make any difference, other than scratching the glass. This description makes me think it isn’t really white film that smears around. How can it smear around, but not be able to be removed? If it were an etching of the glass, the “film smearing around” could be water or oil filling the small roughness, making it transparent at least temporarily. The normal build up on the inside of the windshield that I’m familiar with is fairly easily removed, but it’s caused by outgassing (IIRC), and comes back repeatedly, especially when the car is new. This sounds like something different. Good luck. ---
**Author:** ![Fubaya](https://avatars.discourse-cdn.com/v4/letter/f/c2a13f/32.png) [@Fubaya](https://boards.straightdope.com/u/Fubaya)\ **Post date:** [June 8, 2011, 3:43am UTC](https://boards.straightdope.com/t/how-to-clean-car-windshield/584571/33 "2011-06-08T03:43:58Z")
> [@Grateful-UnDead](#): > > Are you guys serious: use steel wool on glass??? That would scratch the glass so much that I wouldn’t be able to see through it anyway. Or are you just joshin’ me? It doesn’t scratch the glass. Detail shops, body shops, dealerships etc all use the stuff. Just use fine steel wool, not the stuff they sell for scrubbing pots and pans. ---
**Author:** ![JFLuvly](https://avatars.discourse-cdn.com/v4/letter/j/ac91a4/32.png) [@JFLuvly](https://boards.straightdope.com/u/JFLuvly)\ **Post date:** [June 8, 2011, 3:58am UTC](https://boards.straightdope.com/t/how-to-clean-car-windshield/584571/34 "2011-06-08T03:58:07Z")
> [@](#): > > Did you try the windshield washer fluid? Seriously, especially the summer stuff with the bug remover. Also we used cigarette ashes on the outside of the windshield to remove road grime, the stuff that is really noticible when you use the windshield wipers and it leaves a film. Just wet the windshield and rub a handful of ashes on it and it was like new. Not sure how well it would work in your case but it might help. ---
**Author:** ![TehBearJew](https://avatars.discourse-cdn.com/v4/letter/t/eb8c5e/32.png) [@TehBearJew](https://boards.straightdope.com/u/TehBearJew)\ **Post date:** [June 8, 2011, 4:36am UTC](https://boards.straightdope.com/t/how-to-clean-car-windshield/584571/35 "2011-06-08T04:36:54Z")
I use windex or similar and wipe off with crumpled up newspaper. No joke. My mechanic said that’s how he does it. Hard to believe at first but the newspaper doesn’t smear or streak like paper towels. Steel wool…wowow ---
**Author:** ![Grateful-UnDead](https://avatars.discourse-cdn.com/v4/letter/g/ccd318/32.png) [@Grateful-UnDead](https://boards.straightdope.com/u/Grateful-UnDead)\ **Post date:** [June 8, 2011, 4:57am UTC](https://boards.straightdope.com/t/how-to-clean-car-windshield/584571/36 "2011-06-08T04:57:16Z")
Ahaaa success! I tried ethyl acetate nail polish remover (LOTS of it) plus paper towels; then followed up with Armourall Window Cleaner and paper towels. Apparently only terrorists are allowed to buy acetone any more. From what I can see under the lights in my garage, the white streaking is gone and the windshield looks sparkling clean; just like it was when I first took delivery. Thanks for the info on the steel wool; that has been a revelation to me. I would not have dared to use any kind of abrasive on glass, but I will keep that knowledge in reserve. Thanks to all for your suggestions ---
**Author:** ![Askance](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/askance/32/8281_2.png) [@Askance](https://boards.straightdope.com/u/Askance)\ **Post date:** [June 8, 2011, 5:53am UTC](https://boards.straightdope.com/t/how-to-clean-car-windshield/584571/37 "2011-06-08T05:53:03Z")
Make sure you air the car out thoroughly, that nail polish is nasty stuff to breathe in. You don’t want to drive while you can still smell it in there. ---
**Author:** ![Gary\_T](https://avatars.discourse-cdn.com/v4/letter/g/3ec8ea/32.png) [@Gary\_T](https://boards.straightdope.com/u/Gary_T)\ **Post date:** [June 8, 2011, 12:46pm UTC](https://boards.straightdope.com/t/how-to-clean-car-windshield/584571/38 "2011-06-08T12:46:36Z")
Glad your problem is solved. Years ago, I bought a rear window defroster kit. It had the heater grid (VERY thin copper strips) with bonded-on adhesive on one side to stick to the glass. The instructions made a **HUGE** deal of getting the glass **ABSOLUTELY CLEAN**. The main step in this was to clean the glass with acetone and fine steel wool. I don’t recall clearly, but I’m thinking there may have been a follow-up step using alcohol and a cloth. I can only speculate, but perhaps some contaminants lightly bond to the glass surface and require the steel wool in combination with the solvent to completely detach them from said surface. Anyway, it worked fine and there was no scratching whatsoever. ---
**Author:** ![Northern\_Piper](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/northern_piper/32/5304_2.png) [@Northern\_Piper](https://boards.straightdope.com/u/Northern_Piper)\ **Post date:** [June 8, 2011, 2:30pm UTC](https://boards.straightdope.com/t/how-to-clean-car-windshield/584571/39 "2011-06-08T14:30:53Z")
> [@bucketybuck](#): > > [QUOTE=Grateful-UnDead] > > I took it back to the dealer, but they said: “New cars do that; it will go away.” Wut? My career to this point has been spent in dealership service departments and I have never heard of this. [/QUOTE] I’ve had the same problem with two new cars I’ve bought over the years, and got the same answer. And, it does go away over time. [Previous page](https://boards.straightdope.com/t/how-to-clean-car-windshield/584571.md?page=1)