Fenix 3 stuck election problem?

Hey all.  Sorry to ask this here; I'm guessing I could find my answer if I could read the Fenix 3 forums (thanks heaps Garmin, lotsa great content lost there).

I have a VA3 now, so don't really use my F3 anymore.  I'll keep it for the odd triathlon, and maybe for when I get back in the pool as it does have still mode (sorely missing from the VA3).  Anyway, I seem to have the stuck elevation thing happening.  Doesn't ever change up or down.  I can manually enter it, or with GPS and it will change value.  But it's stuck at that value.

I've tried flushing with warm water and soaking it for a while.  Amy other suggestions.  I do remember it getting the odd software update still, but I'm not sure how significant they were.  I'd be willing to try rolling back to a previous version, bit I'm buggered if I can remember the address where all the previous firmwares for the F3 are kept.  

Amy suggestions, or guidance?  Thanks all.