I have a ten year old 16" or 17" Sony Trinitron monitor with a dirty screen that I'm hoping to calibrate for black and white work. Will Coast bar soap and water safely remove the grime without destroying the coating? Or should I use something else? I spoke to Sony tech support using the online chat, but the person I chatting with was not familiar with the Trinitrons and was reading from the same online manuals/tutorials from the Sony website that I read before contacting them. So, I'm hoping for more informed advice from people who have cleaned Trinitrons in the past. Thanks, Mike.