I use a device called the Temperature Stick. It is a WiFi enabled device that measures the temperature and humidty levels in the coach. I can set text and e-mail alerts for high and low temps as well as high or low humidity levels. This at least lets me monitor when humidity levels seem to be getting too high inside the coach.
https://www.amazon.com/Wireless-Temp...l%2C176&sr=1-3
My brother is in the insurance industry and he uses an infrared camera to determine water intrusion in homes, buildings, etc. These devices allow you to "see" where the water is really hiding based on thermal imaging.
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