I wrote the article expressly to deal with cooling. As the article developed, I noticed that dew control shared some common techniques, and possible problems, so I added it at the end. It would have made for an unfinished article if I didn't mention this added bonus from the efforts of cooling a mirror that benefited our productivity, and if also incorrectly applied would lead to unwelcome consequences that we worked so hard to eliminate in the first place!
I guess I could have mentioned dew control in the title. Oh, well, another modification for the Iceman to do...
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