How to tell if anti glare is still there
A helpful answer!
I was buying some IBM P70 CRTs (top end stuff) second hand several years ago, and wanted to check if the anti-glare was still there / how badly scratched it was.
This is the checking method I found on the internet at that time - no idea if it's valid for your LCDs:
1. Get a small lamp, a side table lamp or whatever.
2. Take off the lampshade, so that you've got a naked bulb (40 watt or whatever) - it needs to be a filament standard type bulb, not one of the new energy saver bulbs. I think it needs to be a clear bulb, not a frosted bulb.
3. Turn on the lamp and look at the reflection of the bulb in the monitor screen.
If you can clearly see the filament wires, then the anti-glare coating is still there. If there's too much glare to see the filament, then the monitor coating is gone, or was never there.
It might be worth checking different areas of your LCD monitor - if the bit with the windex is the same as the rest, then you've got nothing to worry about.
hope that helps.
RedTomato