Original post by: Josh W ,
Replace the battery making sure to only use dull, plastic tools to remove the old battery. Wear gloves too! That is some toxic stuff you are dealing with and you don't want to short it with a metal tool or have some of that stuff get on your hands and make its way into an opening on your body. Lithium batteries explode. Its just the nature of the chemistry in them. I've had more than a couple iPhone come in where the screen was lifted from a bloated battery. The battery is normally the cause of the problem and not a symptom, so that should be all you need to swap out. Its a very easy and cheap fix.