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Old 04-14-2012, 06:15 PM   #1
Jay146992
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Join Date: Jan 2011
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My Ride: E90 335i & E46 M3
Spots on nav screen

Anyone know how to get these spots off the screen? Looks a lot worse in person. I tried using screen cleaner but it didn't make a difference.
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Old 04-14-2012, 06:56 PM   #2
06E46M3
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if screen cleaner doesn't get it off, i think the screen is permanently marred. is it plastic?
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Old 04-14-2012, 07:36 PM   #3
ChicagoRY
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I don't have nav, so I can't give you any "this is what worked for me," tips. . .but I have cleaned a lot of funky stuff over the years. Stuff that comes to mind is:

1. Tape off the sides of it (w/ painters tape, not duct tape or anything), so none of this can slide back into the unit. Alternately or additionally to that step you could pull the fuse to your head unit for a few days and give anything that does get back there a long chance to evaporate. Then try the stuff you can get at an auto parts store to either clean the plastic windows in a convertible top ("meguiars plastic cleaner" is one I've used), or polish headlight covers. Potentially one of those mothers/meguiars "power ball" buffers if you feel like getting one of those (you could re-use it for wheels and different stuff in the future). Use a micro fiber towel to buff it out if you don't use one of those buffing balls.

2. If that doesn't work, leave the tape on and try some "rubbing compound" or "swirl mark remover" from the auto parts store, a brand like 3M, meguiars, etc. The gel/liquid bottles are easier to work with than the paste wax kinds. These have tiny abrasive particles in them that will take off a thin surface layer, I mean thin like 1500-2000 grit sandpaper texture thin.

3. If none of that works, or doesn't work well enough, just sit tight for a good deal on a broken Nav head unit for parts on eBay or in the forums, and either steal its screen/plastic cover outright if it looks sharp, or try polishing the hell out of the one that's on the "parts" head unit and if it comes out great, awesome, either way you can still resell it again and get most of your $ back. If all else polishing fails, I'd try wetsanding the screen on a broken "parts" head, since it's out of the car you have 0 chance of screwing anything else up. Get like 800, 1000, 1500, 2000 sand paper (3m makes a variety pack of at least 3 of those together) and some water and you might be able to buff one out nicely. Sometimes after wetsanding you still have to do rubbing compound to make it perfect. If you need some sand paper let me know I could probably send you some left over sheets since you'd hardly need any, and the packs are kinda expensive.

Careful, it takes only like 15-20 sec of smooth wetsanding with each grade, maybe even less, in any given patch. Don't ask how I learned this and what car's I've taken paint off of. grr!

I'm pretty confident that no regular glass cleaner will get it out, that looks really smudged up. But don't worry, all hope is not lost. If you're patient and don't rush, like I tend to do, you can take scratches out of glass with the supplies above.

hth!

Last edited by ChicagoRY; 04-14-2012 at 07:41 PM.
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