TMC is an independent, primarily volunteer organization that relies on ad revenue to cover its operating costs. Please consider whitelisting TMC on your ad blocker or making a Paypal contribution here: paypal.me/SupportTMC

Inner windshield "fogging" or "oiling"...Help

Discussion in 'Roadster' started by TOBASH, Sep 6, 2014.

  1. TOBASH

    TOBASH Member

    Joined:
    Aug 6, 2014
    Messages:
    305
    Location:
    New York
    2011 Tesla Roadster 2.5 edition from Florida.

    Full factory warranty.

    Front window has developed an oily residue on the inner windshield ever since I began to use A/C and front defogger.

    Reminiscent of build-up you might see in car with small coolant leak to defroster, but no coolant odor in car and coolant level seems constant in rear battery reservoir.

    Is this a coolant leak, an oil leak, or is it something else that is less sinister?

    Anyone else have this issue?

    Thanks,

    T
     
  2. wiztecy

    wiztecy Active Member

    Joined:
    Apr 29, 2012
    Messages:
    2,713
    Location:
    Santa Cruz, California, United States
    A trick passed on from an Elise mechanic is to apply Rainex all over the inside of the windshield. Keep applying as needed.

    What's happening is that the plastic is off-gassing and leaving the residue on the window. I did one application of Rainex over a year ago and never needed to do it again, oily residue hasn't appeared since.
     
  3. TOBASH

    TOBASH Member

    Joined:
    Aug 6, 2014
    Messages:
    305
    Location:
    New York
    Great News!

    I'm a great fan of Rainex, so I have plenty here.

    Application with old style Rainex is annoying and I switched to the stuff in the windshield fluid, but for this problem I'm happy to revert back.

    Much Appreciated,

    T
     
  4. wycolo

    wycolo Active Member

    Joined:
    May 16, 2012
    Messages:
    2,422
    Location:
    WY
    Baking in the sun off-gasses the residue of the detailing cleaners that give such a nice look when you get your car back. Soon the inside of windshield is coated with greasy stuff which takes a few cleanings to remove. In fact I don't think I ever completely removed it. I'm looking for a sponge on a 2 ft handle at some housewares dept to make this chore easier btw if these exist.
    --
     
  5. TOBASH

    TOBASH Member

    Joined:
    Aug 6, 2014
    Messages:
    305
    Location:
    New York
    Yes, they absolutely exist as I own one with removable microfiber washable clothes. I may have bought at an auto store or Bed Bath and Beyond.

    Not hard to make. Just get a microfiber clothe and use a Swiffer handle if you can't find the commercially available ones.
     
  6. augkuo

    augkuo Member

    Joined:
    Apr 24, 2011
    Messages:
    549
    Location:
    Berkeley
    Here's one that I've used and it works great - http://www.griotsgarage.com/product/window+cleaner+set.do?sortby=ourPicks&page=2
     
  7. Lloyd

    Lloyd Active Member

    Joined:
    Jan 12, 2011
    Messages:
    4,883
    Location:
    San Luis Obispo, CA
    I was told when Ford had this issue with the Pinto (I never owned one!) to use Bon Ami polishing cleanser to remove it.
     
  8. ElSupreme

    ElSupreme Model S 03182

    Joined:
    Jan 13, 2012
    Messages:
    4,279
    Location:
    Atlanta, GA
    I had this issue with my VW. I used a dry towels to 'absorb' as much as possible. Then I used real 409 (quite a good degrease, and generally very compatible with plastics). Then finally Windex to get the windscreen clean. Took about 2 - 3 iterations over 6 months to get the windshield to stay clean.

    I've also heard that interior RainX works wonders. I have not tried it myself though.
     
  9. ToddRLockwood

    ToddRLockwood Active Member

    Joined:
    Sep 11, 2012
    Messages:
    1,263
    Location:
    Burlington, Vermont
    Not sure about that idea. Bon Ami has feldspar & limestone powder in it that could scratch your glass.
     
  10. strider

    strider Active Member

    Joined:
    Oct 20, 2010
    Messages:
    2,918
    Location:
    NE Oklahoma
    I get this every summer. Just clean it off with Invisible glass as part of my regular cleaning regimen.
     
  11. Skotty

    Skotty 2014 Model S P85

    Joined:
    Jun 27, 2013
    Messages:
    1,440
    Location:
    Kansas City, MO
    I've never had a car that didn't do this. I found that a soft tube sock actually works surprisingly well to clean it off. I tend to just grab whatever is handy to clean it off whenever it starts to annoy me, and for now, the tube sock I pulled out of a backpack filled with clothes is the defending champion. :p
     
  12. Beck2

    Beck2 New Member

    Joined:
    Feb 8, 2015
    Messages:
    1
    Location:
    South Africa
    Hi,
    I have a similar problem. I once cleaned my windscreen with C-Thru on the outside aswell as the inside. Since then +- after 2 days my inner windscreen aswell as the back one starts this thick, foggy oily like streaks. I have tried sunlight with vineger, window lean, purple spirits, etc. It comes off cleaner like never before but after 2 days its back again. Could someone please tell me what to use or should I rather replace the windows?
     
  13. jerry33

    jerry33 S85 - VIN:P05130 - 3/2/13

    Joined:
    Mar 8, 2012
    Messages:
    12,752
    Location:
    Texas
    When the car is new, the outgassing of the carpets and upholstery is going to do that. After a while it becomes less of a problem. The Chemical Guys window cleaner gets it off well enough. If you park indoors, open the hatch and windows so that some of the outgassing exits the car.
     
  14. ToddRLockwood

    ToddRLockwood Active Member

    Joined:
    Sep 11, 2012
    Messages:
    1,263
    Location:
    Burlington, Vermont
    I find that the aerosol glass cleaners do a better job than Windex. Auto detail shops seem to favor them as well.
     

Share This Page