My kindle crashes constantly after water damage.

My kindle crashes and when I opened it shows signs of water damage, although it works for short periods of time, also I've noticed the wifi doesn't seem to be working.

Since it works for short periods of time, I'm wondering if it's overheating at all, and in which case, is there a heat sink I can get to re apply thermal paste to keep temperatures down?

Is there anything that can be done with this one or is it a lost cause?

It wasn't working at all until I opened it up and cleaned it as best I could.

At least it is now switching on and restarting.

If I can just get the board out I can probably give it a good clean.