I would highly suggest not using rice unless it minor water damage and you wrap the phone in paper towel beforehand. Typically rice will get into your ports and it also has a lot of dust in the rice. I would suggest trying to follow along with a breakdown video as far as you dare to go. Then take canned air and spray it. Then leave it out for a day. If you don't want to take it apart, or the above solution doesn't fix it, almost all repair shops fix water damage. Sometimes water can damage to a point of no return; in this case, you can try replacing the motherboard in the phone, but at that point it's probably time to get a new phone.