Flash doesn't work (ever). got it wet

Water on or in any kind of camera can spell doom to the inner workings and circuits.
If the camera ever gets any kind of water inside, the chances of fixing the camera is not good.
Something which could be tried when any kind of water gets into a camers's insides is this:
Immediately remove the battery or batteries. The reason for this is that the circuits are live when a battery or batteries are installed. This can lead to damage and shortages which will lead to all kinds of circuit troubles.

My suggestion is to sell the camera on a site such as Ebay for parts, as is, or repair parts.
The reason is the the repairs more than likely will cost more than you want to spend.

It seems that the circuit connecting the camera to flash or the flash bulb is damaged and it needs to be repaired. It might cost more, so you may use the external flash light during the night,