Hello, I have 20 audiomoths currently deployed inside waterproof cases inside nestboxes. 3 of them have encountered an issue where the gain seems to have become extremely low. For the rest of the audiomoths there's lots of outside noise from other birds, cars etc. but for these three they mostly just pick up the birds in the nestbox. These three originally worked well but this seems to have happened between scheduled recordings (I have them set to record 3 hours after sunrise and 3 hours before sunset, the recordings changed at some point in between these two sets i.e. overnight or middle of day).

This isn't really the end of the world in one sense since I am interested in those birds however I would prefer if they were all consistent. I've attached spectrograms from the same audiomoth before and after the recordings got worse. Any help would be appreciated.

Thank you.