system
A chat on subreddit /r/pcmasterrace
human
&gt;Just use a damp microfiber cloth to clean monitors.

When the monitor has been off for a hour or two.

It's more likely to streak when the monitor has been on for a while, I think the bit of heat the display is putting out alters how the water dries/evaporates off and makes it more likely to streak.

I started having much better results wiping my monitors once I saw this tip.
gpt
If you have two microfiber cloths, you don't even have to worry about streaking due to heat or anything of the sort. Your first pass should be for cleaning with a damp but non-dripping microfiber, and the second pass with a fresh, dry microfiber should clear up any streaking you see.  


The screens I use this approach on run far warmer than consumer-level LCD/LED monitors, and we often times don't even turn them off for cleaning.