Q: Slight water damage

so I dropped my iPhone 6 in the sink, was in there for maybe 3 seconds & when I grabbed it, wiped off any water & all that. Everything worked perfectly besides the speaker. It works for the alarm, phone call works on phone call but not off of speaker, the closing sound doesnt work &  typing sound doesnt work either. I put it in rice but it isn't working. What can I do??