30" DVI screen has permanent smudge...

Is this the experience Apple wants me to have after only a few years with their product?
I have a 2009 30 Inch DVI display.  For over a year I have noticed that the display is showing 'gray smudges'.   Some are as long as 6 inches and about 3/4 inch side.  Others are just nickel sized spots. 
If I drag my finger, lightly, down a 'healthy' part of the screen it makes the same 'smudge'.  (Except the finger smudge is temporary)
Question: What can I do to rid my monitor of these spots?  If I had a CRT I would degause it.  But, what do you do with an LCD?

I have a small smudge also that has appeared at the top of my screen (mostly on the bezel). It seems to go away temporarily when I wipe it. It's not really a big deal as it is right now, but I wonder how common this is?

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