Mics Not working after water damage (XPERIA M2)

Dear you all.

My Xperia m2 has fell into the water for 1 minute approx.

After that i disassemble it and cleaned all pieces with isopropyl alcohol.

After assemble everything works fine except the telephone microphone in a regular call and also with a loud speaker call activated (when I recorded a video the audio was fine, i think are two mics one for call an another for video camera, dont?)

I tried to disassemble again only the bottom parts to clean it again, but nothing changes.

My question is what the suggested pieces are that I have to buy to fix it?. Also at first assemble the loudspeaker works fine, but after a second clean, I mess the loudspeaker, because i trying to open it only for curiosity XD.

thank you for read!

kind regards!