The dust, which makes the display cloudy actually is at the back of the LCD panel and on the backlight panel. It is possible to remove the aluminium panel case and open the LCD assemble. I used cotton cloth and a mixture of ethanol and denaturalized water (1:4) to clean those panels. Tricky it is, as there is glue and tape and magnets which try to confuse you. If you are careful and bring some engineering talent with you it is no big deal. Try to not bend cables, everything else is quite robust.
good luck!
Rob
www.silveronglass.com