"Jerry G." wrote in message
...
I use distilled water only. It is mainly dust that you are trying to clean
off. If it is grease, and cigarette smoke stain, use water with a about
20%
isoprophal alcohol mixed in. You don't want anything too strong, that can
damage the coating on the CRT glass.

True, but if you're not going to do it every day, there's nothing wrong with
Windex. I've cleaned lots of optical equipment with Windex (carefully).
The main thing is to get it off again, or follow up with distilled water (to
ensure it dries clean) or sufficiently pure alcohol.