I have a 3 year old 42" LCD TV and the chasis had started showing signs of aging. The gloss finish on the screen and chassis has gone!
The problem is that cleaning the screen/chassis with Colin or likes actually rubs off more than just the dirt from TV. It gradually "takes away" the sheen as well. So I found this work around,
Use a regular cheapy Rs. 150/- or so dashboard cleaner(Automotive)
which can be sprayed on the LCD screen and chassis from a distance of 6 inches. Leave it for about 5 min after a uniform spray of 30-45 seconds. After that very gently rub off the excess spray using an old cotton hanky and see the magic. For the next 1 week you wont see any dirt accumulating onto it.
Dont forget to use this kind of Feather Duster
(Rs. 100 for original)before doing this otherwise the results would be disasterous. And yeah, Dont let the household maid do the "dusting and Cleaning" of your Home theatre setup.

hyeah: