By now most people have had the unfortunate experience of getting their phones wet and had to wait while it sits in a bag of rice to see if it survived — if you haven’t, consider yourself one of the lucky ones! The best thing to do when this happens is immediately take the battery out of your phone and put it in a bag of rice and wait a few days to see if it will be able to dry out enough to function again.
Recently I dropped my iPhone in a swimming pool and found out the hard way you need a special tool called a Pentalobe screwdriver to remove the battery cover, since I didn’t have one the current and water mixed causing the circuit board to start corroding.
But you still have hope. With a little patience and this video you will be able to take your iPhone apart and scrub the board with a toothbrush and some isopropyl alcohol (90% or better) to remove the corrosion. For a few extra bucks I opted for the purest Isopropyl I could find (99.9%), which has a faster drying time and less residue than the diluted stuff available at most pharmacies.