Cooled 1600s have dessicant inside the sensor chamber, and the chamber is sealed with O rings on the cap and glass window, the uncooked cameras obviously don't come with dessicant provisions. You could try flooding the interior with a dry gas, like Argon, which you can buy at Bunnings, but it would not last very long imho due to being heavier than air and leakage eventually. Pretty sure that what your suggesting has been tried many times before, and a search here and on the Cloudy Nights forum will probably be very instructive.
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