I dropped my phone in. I dropped my phone in a little kiddie pool.. took it out and dried it out

Question

I dropped my phone in a little kiddie pool.. took it out and dried it out in the sun.. it worked fine after that for the first day... but then the next day there is an annoying "interferance" noise on the line.. it is worse on the receiving end of the call.. everything else on the phone is fine.. it's just this annoying noise on the phone line.. any thing I can do ???? thanks.