Ionic not holding a charge and cannot turn it off

[Pampas]

I've had my IONIC for over two years.  Up to two weeks ago my battery was lasting 5 days.  That was awesome.  Last weekend I charged it, and 24 hours later it was dead.  I charged it again and it lasted 18 hours.

I tried to connect it to my iPhone and it would not connect.

I did a full reset (not factory reset) and it didn't help.  I tried to turn it off (Settings / About) and the About won't allow itself to be chosen.  It clicks, the screen turns blue, and then kicks me back out to Settings.

I was trying to find a link to do a full reinstall of the operating system, but I can't find it anywhere.  I'm thinking of doing a factory reset, but if the OS is screwed up, it won't help. 

Anyone have any ideas on how to get the OS reinstalled???

Moderator edit: updated subject for clarity

[EdsonFitbit]

Welcome to the Fitbit Community, @Pampas.

Thank you for trying to resolve the issue with your Fitbit Ionic before contacting us.

There is no option to reinstall the OS. In this case, I would recommend setting up your Watch as a replacement device:

1. Tap the Today tab , and tap your profile picture.
2. Tap Set Up a Device.
3. Choose your device and follow the on-screen instructions to continue.

If you are having difficulties to set up your Ionic, please follow these troubleshooting steps.

For tips to extend your Fitbit device's battery life, please visit this article.

Hope this helps.