オリジナル投稿者： gonnahitcharide ,
Like many here, I had the same problem with my iPhone 6s. I used a q-tip dipped in some isopropyl alcohol and then slightly squeezed out the excess. I wiped down the ear speaker and just let it dry naturally. I forgot all about it until the next day when I received a phone call, and whaddayaknow, it worked !!!