This is not a difficult replacement but it is small inside the headset. you will need an exacto knife and a soldering iron. Take a look at the video and I will give you some good tips.
hold the power button down for about 3 seconds- that should either 1. put it into pair mode (red + blue), or 2. Shut it down so you can retry pairing/turning them on. I’m happy to help further over the phone at https://www.6ya.com/expert/susan_42b401e0b1603d8a
only hope maybe is to find some rubbing achohol with high alcohol content and drip it in the circutry alcohol will evaporate quickly along with the water dont know if it will work if the speaker material is warped :/ i tried this method on a camera i dropped in water worked fine afterwards hope this helps you
