I use the cleaner from Eizo. Use: turn off the screen, spray the cleaner on your monitor and clean with a microfiber cloth.
IMPORTANT: Never use thinner, benzene, alcohol (ethanol, methanol or isopropanol), abrasives or other strong solvents, as these may damage the cabinet or LCD screen.
Cabinet
To remove stains on the cabinet, wipe them off with a soft cloth slightly dampened with a mild detergent. Never spray wax or other cleaning agents directly onto the cabinet.
LCD Screen
To clean the screen surface, use a soft cloth (such as a cotton cloth or an eyeglass cleaning cloth). Stubborn stains can usually be removed by dampening the cloth with a little water.