You can get some 99% isopropyl alcohol, open it up, and paint the chips with it.... Steer clear of the diodes though. My strong guess is that it’s toast, although the new ones supposedly have better water resistance, the flickering and going out means it shorted.
I would actually 100% call AI customer service tomorrow, explain what happened, and see what they offer/recommend. They are fantastic, I mean truly fantastic to work with. Given what happened they probably won’t do it for free, but you might be shocked what kind of swap deal they offer you. Heck, they replaced a dead hydra 26 HD that came from Redsea for me two months out of warranty and without a receipt (they have serial numbers, and they knew it’s use dates from the app). Give it a shot.