Go Back   Team-BHP > Under the Hood > Modifications & Accessories


Reply
 
Thread Tools Search this Thread
Old 17th July 2007, 15:58   #1
Newbie
 
mvk_vinodkumar's Avatar
 
Join Date: Jul 2007
Location: Chennai
Posts: 4
Thanked: 0 Times
Question Unclear Glass during Rain

Hi,
I have owned an ALTO LXI a week back and i had to drive the car in the rain during night, a couple of times. Most of the time, i use to have my AC ON. During the rain, a white layer forms in the outside of the glass which makes difficult for me to see through the glasses.
It is definitely not inside, since i used the defroster during the rain.

Infact, the white layer forms inbetween the wipping cycle of the wiper and makes it difficult for me to see through.

Please help me in understanding what would be the reason for the glass getting unclear during rain@ night.

ALso, let me know what i need to do, to avoid such problems in future.

Regards,
Vinod
mvk_vinodkumar is offline   Reply With Quote
Old 17th July 2007, 16:46   #2
Team-BHP Support
 
Rudra Sen's Avatar
 
Join Date: Apr 2004
Location: Bangalore
Posts: 10,404
Thanked: 4,092 Times
Default

Quote:
Originally Posted by mvk_vinodkumar View Post
since i used the defroster during the rain.
What is this defroster?
Rudra Sen is offline   Reply With Quote
Old 17th July 2007, 16:48   #3
BHPian
 
Join Date: Jan 2007
Location: Shillong
Posts: 925
Thanked: 83 Times
Default

He probably means the defogger
SumitB is offline   Reply With Quote
Old 17th July 2007, 16:51   #4
Team-BHP Support
 
Rudra Sen's Avatar
 
Join Date: Apr 2004
Location: Bangalore
Posts: 10,404
Thanked: 4,092 Times
Default

Defogger? Then it should not be switched on when AC is running.
Rudra Sen is offline   Reply With Quote
Old 17th July 2007, 16:54   #5
Senior - BHPian
 
manikjeet's Avatar
 
Join Date: Sep 2006
Location: chandigarh
Posts: 1,606
Thanked: 109 Times
Default

but an alto lxi or even the vxi never came with a defogger
manikjeet is offline   Reply With Quote
Old 17th July 2007, 16:56   #6
BHPian
 
Wimwian's Avatar
 
Join Date: Feb 2007
Location: Mumbai
Posts: 191
Thanked: 4 Times
Default

This is a very irritating problem during rains, when putting the A/c on makes the windows misty (since the glass becomes colder than the outside temp). As a result, side-vision is seriously hampered.

Any solutions?
Wimwian is offline   Reply With Quote
Old 17th July 2007, 16:57   #7
Team-BHP Support
 
Zappo's Avatar
 
Join Date: Oct 2005
Location: Hyderabad
Posts: 5,650
Thanked: 2,010 Times
Default

mvk... this is a known phenomenon. its just the reverse of the regular fogging from inside. Basically the fogging happens due to the temperature difference on the two sides of the glass depending on which side is warmer. So the fog can very well happen from outside as well. In fact it does happen with everyone some time or the other. The best solution I have found is to switch off the AC (yes, switch it off) and roll down the window if possible. Essentially try to neutralize the temperature difference between the two surfaces.
Zappo is offline   Reply With Quote
Old 17th July 2007, 16:58   #8
Team-BHP Support
 
Rudra Sen's Avatar
 
Join Date: Apr 2004
Location: Bangalore
Posts: 10,404
Thanked: 4,092 Times
Default

Quote:
Originally Posted by Zappo View Post
The best solution I have found is to switch off the AC (yes, switch it off) and roll down the window if possible. Essentially try to neutralize the temperature difference between the two surfaces.
Or just keep the AC on.
Rudra Sen is offline   Reply With Quote
Old 17th July 2007, 16:58   #9
Senior - BHPian
 
msdivy's Avatar
 
Join Date: Aug 2006
Location: Bangalore
Posts: 1,445
Thanked: 837 Times
Default

Did he mean demister?
msdivy is offline   Reply With Quote
Old 17th July 2007, 17:03   #10
BHPian
 
bruty's Avatar
 
Join Date: Mar 2007
Location: Delhi
Posts: 232
Thanked: 6 Times
Default

I think the best results are achived when we roll down our windows a litle, so that water does not come inside but the temparture in and out become same, to remove the white layer formed on teh glass. I have done this number of time and it works.
bruty is offline   Reply With Quote
Old 17th July 2007, 17:03   #11
BHPian
 
Join Date: Jan 2007
Location: Shillong
Posts: 925
Thanked: 83 Times
Default

Vinod you need to let us know exactly what you meant! Defogger or Demister?

As Rudra and Zappo said, the best way to avoid this is to either keep the ac running or roll down the windows to neutralize the temp. I don't know how effective is the use of those sprays which claim to cut the formation of mist on the windscreen. In Shillong we have this problem quite often and I have realised that the best way to avoid is to keep the ac on. I cannot keep the windows down as the rain enters the cabin and I don't have a rain visor installed.

Last edited by SumitB : 17th July 2007 at 17:07.
SumitB is offline   Reply With Quote
Old 17th July 2007, 17:04   #12
k36
BHPian
 
k36's Avatar
 
Join Date: Dec 2005
Location: Pune
Posts: 133
Thanked: 19 Times
Default

Keep AC (compressor) running with the temperature set to ambient, instead of the coolest setting, solves the problem.
k36 is offline   Reply With Quote
Old 17th July 2007, 17:05   #13
Team-BHP Support
 
theMAG's Avatar
 
Join Date: May 2006
Location: Long Island, NY
Posts: 7,033
Thanked: 1,470 Times
Default

MVK,

This is a common occurance - a semi-permanent film on the outside of the glass during rain even if the defogger/demister in on. I experienced it on my MLR drive and the damn layer wouldnt go away even with wash-wipe cycle from the wiper/downing all windows.

The solution I adopted - Sunsilk shampoo sacthets emptied, properly lathered across the windscreen by hand, and rinsed/dried with large tissue papers. Worked like a charm.

Last edited by theMAG : 17th July 2007 at 17:06.
theMAG is offline   Reply With Quote
Old 17th July 2007, 17:07   #14
Team-BHP Support
 
Rtech's Avatar
 
Join Date: Apr 2004
Location: Bombay
Posts: 5,769
Thanked: 212 Times
Default

I know exactly what you are talking about vinod. Happens a lot here near the coast. It is basically because the AC cools the glass to a temperature far lower than the outside temperature. The humid air in our coastal area's means that the moisture condenses on the outside of the windscreen, side and rear glass. Think of the moisture that forms on the outside surface on a glass of cold water. it's the same principle.

There is not much you can do really, but you could try to minimise its occurrence by:
- directing the draft away from the windows
- controlling the temperature of the AC
- on the side windows, you can simply wind them down and up again to get rid of the moisture on the outside.
- For the rear windscreen, use the defogger.
Rtech is offline   Reply With Quote
Old 17th July 2007, 17:16   #15
Senior - BHPian
 
msdivy's Avatar
 
Join Date: Aug 2006
Location: Bangalore
Posts: 1,445
Thanked: 837 Times
Default

Quote:
Originally Posted by SumitB View Post
He probably means the defogger
Quote:
Originally Posted by Rudra Sen View Post
What is this defroster?
Quote:
Originally Posted by msdivy View Post
Did he mean demister?
Defogger: An electric or hot air device to remove the fog or ice from both the inside and outside of the windshield, backlight (i.e., rear window) or even mirrors. Some are designed to remove fog from the side windows.

Defroster: The apparatus (either a fan connected to the heating system or electrical wires imbedded in the glass) which removes frost or fog from a window.

Demister: A British term for a defogger or defroster

Source: Dictionary of Automotive Terms Abbreviations
msdivy is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
Rain, rain & even more rain...at Chandipur, Orissa gmhossain Travelogues 11 8th November 2014 22:46
XYG Glass or Saint Gobain glass HappyRoadie Technical Stuff 10 2nd June 2011 19:50
Trip De Goa - Rain, More Rain traveloholic Travelogues 43 3rd November 2009 10:34
sl320 mercedes 1996 with glass roof torquey Shifting gears 1 17th April 2004 01:24


All times are GMT +5.5. The time now is 03:57.

Copyright 2000 - 2017, Team-BHP.com
Proudly powered by E2E Networks