I dropped my iphone in water and it works perfectly. What precautions should I take?

I dropped my iphone in a (fortunately clean) toilet for about two seconds before taking it out, removing its case, and completely drying it. Everything worked perfectly except for the external speaker was a little quiet and buzzy, though it is back to normal now. It was on for about another fifteen minutes until I saw a google result that it should be immediately turned off and placed in a bag of rice, which it is now. However, most of the results i saw said the phone needed to be in the rice for three days. Do i really need to do it that long? I'm a college student so i use my phone for pretty much everything. Will it be okay if i just leave it in there overnight?

I don't see a delete button for contacts in iPhone 6?

Hi, where is the RED delete button for iPhone 6, I looked up tutorials online and it's nowhere. I clicked on edit and it just shows how to edit photos, address, but no delete. I can add contacts, how are you supposed to delete them?

Added (1). @Mamianka But I did, there's no button for delete at the bottom.

Should I preorder the iPhone 6s or wait?

I want to order the iPhone 6s but I noticed it said "ships by 10/14" and I think that's a little ridiculous. Especially since the phone is released September 25th. I'm wondering if I should just go in to a AT&T store instead and get the phone on the day it's released, but I'm worried they won't have any available and I'll have to wait longer.

Want to get new iPhone but have 18 months left on current contract?

Currently have Sony Xperia Z3 Compact, which I thought looked great. Turns out isn't as good as I thought it would be and moving over to an android phone from iPhone was bad idea. Now I want to go back to iPhone.

Any idea how I can do this without having to pay a lot of money to get the new iPhone on my contract?