5c in swimming pool and doesn't power on

@lucky2 biggest problem here is this " rice for a couple months" Rice does not work. It is the equivalent of not doing anything. Your phone will most likely have died of corrosion damage.

The proper step would have been to not try to turn it on, to charge or to sync is. This could potentially make a bad situation worse since it could shorten more components on the logic board out. Disassemble your phone by using this guide. Clean your phone with 90%+ (or better) isopropyl alcohol. Use this guide to clean your phone. It was written for a 3G but all the steps are pertinent to your phone as well. Inspect your board for any missing or damaged components. You must remove all the EMI shields to clean the board. Once properly cleaned, replace the battery , then reassemble and re-evaluate. Water damage is the hardest to diagnose and to repair since almost any part can have failed.