|Image from John 'K' on Flickr.|
I was excited to see a company is working on the problem, and the solution sounds pretty cool (if you're geeky like me and like this kind of thing). According to a press release sent out recently, Clear-tone Hearing Aid Laboratories has developed "MPS Technology" to create a moisture-repellent bond that binds to the surface of an object. It's invisible and doesn't affect the acoustics of the device.
There's more information over at Nanowerk. Pretty cool!