The inside of an electronic device. There's a packet of silica gel beads glued to one of the internal walls https://digipres.club/system/media_attachments/files/113/233/981/363/308/304/original/78ec4b45214ccfed.jpeg
I'M IN.More pictures later, I gotta go take someone to the doctor, but for now... Why design your product to be waterproof when you can just glue some silica packets in there?