I always follow the manufacturers recommendations, from NEC PA series up to and including PA301
"Clean the LCD monitor surface with a lint-free, non-abrasive cloth. Avoid using any
cleaning solution or glass cleaner!"
Cleaning the LCD Panel
• When the LCD is dusty, please gently wipe with a soft cloth.
• Please do not rub the LCD panel with hard or coarse material.
• Please do not apply pressure to the LCD surface.
• Please do not use OA cleaner as it will cause deterioration or discoloration on the LCD surface.
Cleaning the Cabinet
• Unplug the power supply
• Gently wipe the cabinet with a soft cloth
• To clean the cabinet, dampen the cloth with a neutral detergent and water, wipe the cabinet and follow with a dry cloth.
NOTE: Many plastics are used on the surface of the cabinet. DO NOT clean with benzene, thinner, alkaline detergent,
alcoholic system detergent, glass cleaner, wax, polish cleaner, soap powder, or insecticide. Do not touch rubber or
vinyl to the cabinet for a long time. These types of fl uids and fabrics can cause the paint to deteriorate, crack or peel.http://www.necdisplay.com/cms/documents/UserManuals/PA_Series_UserManual.pdf
I always stayed away from alcohol and ammonia