I had a similar problem with a cannon video camera a few years ago, I took it via ship to Bali, ship was aircon & cool & dry inside, took it outside into the heat & humidity & it completely fogged up on the inside, mic stopped working & it was never the same but they blamed it on rust, so there is more than one way to get a camera wet on the inside......cold car-hot day-wet...... I read through the instructions & they actually warned about this & how to stop it happening.

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Beaten up old 98 Gen 2 Liberty, 13.0, stock V3 STI running gear.
07 Transit motor home
69 VF & 70 VG Valiants needing full restoration
Yamaha Zooma 50cc rocket hopefully going with the Transit.