IPhone got a bit wet from the ocean (still works a bit) how can I fix it?

Okay so I was at the beach and I had my phone wrapped up in my towel, then the tide came in really really quickly and took my towel with my phone into the ocean. I raced over to get it out and it was pretty wet but it was still on. My dad dried it off and poured a little bit of fresh water over it because the salt water is really bad. Then he blew all the water out with an air compresser.
All my stuff is still on it and it all works except the home button doesn't work so I have to use the assesive touch, and if I turn it off it turns back on again.
Is there anyway I can fix the home button or the other thing? Also if there's any salt in my phone can I wreck it over time?

QUICKLY put it in a bag of dry rice! The rice absorbs as MUCH moisture as possible from your phone. You gotta hurry, though.

I don't know if it's just me, but salt and a battery= KABOOM.
i suggest you just get it replaced before the salt burns your phone from the inside.

Shut it off and place it in a bowl of uncooked rice.

take off the case you may have on it, and let it sit in the rice, completely submerged at least overnight. That should absorb any water left in the device. That should get your home button to work if water is preventing it from working, and it should get rid of any salt as well.

Start by closing it in a bag of rice to remove any excess water that might help if there's salt it might affect it some but it should be good enough