Charger won't go in

Rudegar pretty much provided you with most of the possibilities on why you are having this issue.

At this point, you do NOT want to continue trying pushing the power adapter cable into the Lightning port. Instead, you need to take your device to your local Apple Store or Apple Authorized Service Provider to have them take a look and provide you with your repair options. Do note that Apple does not cover damage caused by liquids.

there are 3 possible explanations

1. there is debris or something stuck in the connector of the ios device that needs to be removed using a toothpick or math or the likes before the cable will fit
2. there connector of your cable is somehow damaged so it's shape no longer fits
3. the connector in your ios device is somehow damaged so it shape blocks the cable connector to be insert.