This has been brought up before. It's at your own risk of course, but there are tutorials online on how to either dissemble the camera and clean the contacts, or very carefully tilt the camera the right way and pour pure alcohol up the battery compartment (alcohol cannot have water or components can rust). I haven't ever done either, but the logic is solid. Can't say that I would do it though. I'll have to decide when I run into that problem.
I see how to fix it (at you own risk) in You tube. My point is if the shutter release burtton fails the rugged metal body becomes aboat anchore. So why there is a lot of people on this site insist on metal boby or nothing??