Don't despair, yet, anyway. As others have suggested, get the watch opened, then get it into more heat than the 73 degrees you've tried so far. If you can get it under an old-fashioned incandescent light bulb for a few hours (after opening it), that should drive out the moisture, then put the back of the watch back on. Once dried, just treat your watch as if it were a delicate vintage watch with respect to water exposure: careful when washing hands, no showering or swimming with the watch on. Here's a helpful video on how to get your watch open. The rubber ball described in the video is easy to find online.
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