Normally I would just use a damp cloth or a soft brush to clear off the dust It does the job and most modern LCD has a layer of protection in front so don't worry about scratching anything.

i'm afraid that protection layer will scratch..

I've done it for years on all my LCD's including Dell Ultrasharps I don't see any scratches at all. Just make sure that you're using a clean damp cloth, not a dirty one with dust all over.

i got 1 last time, crt btw.. the anti-glare coating peel off..
end up to scratch all over the screen..

You also know how to say it's CRT Now we're talking about LCD and they are 2 different things. If I swim using the watch that is made in 1920 that my grandfather uses, it will spoil but does it also mean I cannot swim with my water resistant Casio watch? It's not at all a fair and logical comparison isn't it?