A cheaper effective option is a Microfibre cloth, no chemicals sprays req,
I use them on my lcd monitor and the crystalbrite screen of my Acer laptop, results are xlnt, cant see the results being anything less impressive on a plasma/lcd screen.
1 microfibre cloth run under a hot tap then thoroughly rinse to leave it still warm [akin to the hot towel you used to get on flights], wipe your screen, then when finished use the 2nd dry microfibre cloth to finish.
I bought locally for £1 each and use solely for the screens
btw, hello to the forum