Thanks for the help, folks. My Gear Fit absolutely refused to charge last night, no matter what I did (different charge cradles, different cords, left it plugged in all night)... but after it was plugged in all night and reset it (15 sec hold), I reconnected the bluetooth on my Note4 and now all is well... I think LOL.
I had been trying to figure out a good way to clean the contacts. I never thought about a pencil eraser. I was just wetting it a little and that had helped before but the corrosion has been getting worse. The eraser helped a lot!
Thank you so much. I use my Fit for everything and wasn't looking forward to having to buy a new one, as this one's just out of warranty!