Help! constant reboots and very fast battery drain even when completely stock

I just washed my watch with tap water to clean it up. but after i dried it up, the watch keeps rebooting every few minutes and becomes quite warm.
I even restored it back to lollipop but same thing happens. also uninstalled all 3rd party apps from my phone.
did washing it cause the problem? i read here somewhere that they even dive their watch on a swimming pool with no problems.
please help me troubleshoot this. I won't be able to send this to a service center since I work in a remote location. :crying::crying: