Hello
Find a friend with a vacumn pump used on car or house air conditioning to remove moisture from the Freon lines before they chg lines back up with Freon.
Put the camera in a 5 gal bucket seal the lid and put a 1/4 flare fitting on bucket and run vac pump for 30 minutes as this will pull the moisture into a vapor and discharge it outside the bucket.
That will get the moisture pulled back out for you .
Eklb