Rice stuck in charging port

Honestly best I can tell you is to take it into an Apple store or an authorized service center and having them do it, otherwise you risk damaging the port: https://locate.apple.com

And if you put it in rice because it got wet, you probably have a bigger issue than a grain of rice stuck in the port, so having them check it out would be the best bet all around anyway.

You can try to carefully coax it out, with a non conductive object such as a plastic or wooden toothpick.

Move it around carefully and see if you can dislodge it.