Nobody likes to be called a dummy by a dummy.

Something got onto my Plexiglass-covered monitor that ETCHED

the plexiglass. There's a mediumish smear on the left side of my right hand monitor's plexiglass, so I pulled out the windex and a soft paper towel and tried to buff it off. It's PERMANENT. Some kind of foggy smear that won't come off.

I thought for a moment that condensation had gotten BEHIND the plexiglass covering the display, but that's not it. When I pass the towel over that portion of the display there is a noticable "drag" when the towel comes in contact with the smear, so it's external.

WTF??@!
Permalink Mark Warner 
January 9th, 2006
Windex damages plastic monitor screens, so I am told. You should only use special purpose screen cleaner.
Permalink Ian Boys 
January 9th, 2006
I've been using Windex on these displays for 3+ years with no problem whatsoever (until this one).
Permalink Mark Warner 
January 9th, 2006
He never said it *instantly* damages plastic monitor screens -- maybe it takes 3 years or so.
Permalink Almost H. Anonymous 
January 9th, 2006
3 years to make a sudden, very discernable stain over a decent area (that was crystal clear last week)? That's a good trick. :)
Permalink Mark Warner 
January 9th, 2006
I can't say for certain. Clearly, neither one of us understand the physics behind it. ;)
Permalink Almost H. Anonymous 
January 9th, 2006
Hmm...assuming you didn't recently switch brands of Windex or something, that's pretty weird.

The best WTF moment I ever had with something like that was when one of my printers mysteriously developed a giant melted gouge through the front of the paper catch tray that looked like someone had taken a mini light saber to it.

I theorized for days over how it could have possibly happened and was just about to give up and settle on aliens or poltergeists as an explanation when my girlfriend walks into the room and sets her magnifying makeup mirror on the bed directly in the path of the sunlight coming through the window...apparently the office/guest room was her favorite place to tweeze her eyebrows due to the bright natural light.

Apparently, the printer gave its life to save her from burning the building down...
Permalink bionicroach 
January 9th, 2006
Well I'm super pissed because I've had these two displays for over 3 years and they cost me $1100 between the two. I SOOOOOO can't afford to replace them.
Permalink Mark Warner 
January 9th, 2006
That's better than my monitor. If I push on the screen, a little fingerprint LCD coloration appears around it. If I sneeze and hock a loogie on the screen, getting it off requires some sort of cleaner because the surface isn't completely smooth.
Permalink MarkTAW 
January 9th, 2006
Yeah that's a typical LCD. That's how my fiance's and daughter's are.
Permalink Mark Warner 
January 9th, 2006
Cat urine has ammonia in it. Have you upset your cat lately?

+++

I know they make plexiglass polishing compound, but if you're talking about an LCD panel here, I don't really think that it's actually plexiglass on the screen. Plus, many screens have that super-fine anti-glare texture on them which would make buffing almost impossible anyway.

Assuming it's even removeable, I wonder if the manufacturer would charge an obscene amount of money for a replacement screen overlay. That can't be a very expensive part of the monitor...the question is whether they'd sell you the part.
Permalink bionicroach 
January 9th, 2006
It's definitely plexiglass. These monitors have a very thick plexiglass plate over the LCD itself. That's the reason I bought them, they're gorgeous. :-)

The cat is female, so I'd be surprised if she'd sprayed. It might be pheremone though. Who the fuck knows.
Permalink Mark Warner 
January 9th, 2006
If its really plexiglass, you can uses a very mildy abbrasive car polish (get one designed for clear coats). It should but it right out.
Permalink ronk! 
January 9th, 2006
I used to use this stuff to polish plexiglass when I worked in a car audio shop:

http://www.noscratch.com/novus/

How much your monitor's screen has in common with a mirrored window in a neon lit woofer box is another question, though...
Permalink bionicroach 
January 9th, 2006
> If I sneeze and hock a loogie on the screen, ...

awwww shit ... thanks MarkTAW, my sinuses are full of Pepsi now.
Permalink PNII 
January 9th, 2006
Windex isn't suitable for cleaning plastics; over a period of time it will attack the plastic and cause precisely the kind of problem you're having, in addition to tinging it a faint yellow.
Permalink Mat Hall 
January 10th, 2006
That's true for ABS type plastics. Don't use anything with ammonia in it anywhere near plexiglass (or other soft plastics), as they will harden the plastic and change its properties over time.

There's a product called Plexiclear which is used for aircraft windows.

Generally a very very light buffing with a very very soft cloth is enough to clean a screen unless you have expectorated over it. If you use a paper towel you will scratch it.

One final point, aged female cats will piss wherever the fancy takes them. Warm computers are especially favourable.
Permalink Simon Lucy 
January 10th, 2006
This particular female cat is 2.

I don't know, I guess it's ruined. I'll try to find some rubbing compound locally with a fine enough grit for plexiglass, I guess. I'm leery of ordering such items online, for whatever reason.
Permalink Mark Warner 
January 10th, 2006
"my sinuses are full of Pepsi now"

Try that with Listerine. I gargled with it and kind of half choked, forcing it back through my nose and into my sinuses.

I would rather pour boiling lava into my eyes than go through those five minutes again.
Permalink Chooser 
January 10th, 2006
I think rubbing with anything will make it worse. I believe for aircraft windows they give them a kind of chemical peel but that sounds expensive.
Permalink Simon Lucy 
January 10th, 2006
The etch seems shallow, though, so if I rub a wide enough area I should be able to smooth it out, I think?

Maybe I should leave well enough alone, but boy am I pissed.

Philo
Permalink Mark Warner 
January 10th, 2006
You just will not let it lie.
Permalink Simon Lucy 
January 10th, 2006
What's on the end of the stick?
Permalink Mat Hall 
January 10th, 2006

This topic was orginally posted to the off-topic forum of the
Joel on Software discussion board.

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