Well…you may have killed the battery when it was wet for that long. All I can suggest is leaving it on the USB to charge slowly (as opposed to the faster wall charger) and hope for the best. But you may have to give up and get the Clip+. It’s not as good but it’s adequate.
The Fuze is an old unit, rechargeable batteries do give out, and who knows how the battery was reacting to being repeatedly washed.
Ditto for the backlight.
