My younger Son likes spilling his milk all over the place. Two days ago it was my iPhone’s turn. While I was busy working on my laptop, he chose to bath my phone with some milk. There was so much milk on the phone that I wasn’t able to see the screen. I immediately took a tissue paper to wipe out all the milk but there was a problem. The phone was all sticky and then I had to wipe it with a wet tissue.
Next morning when people called me, I told them there is a problem in their phone as their voice was too low. Funny! After a couple of calls I remembered about the last night incident and knew that it was the milk or water that has damaged my iPhone’s ear piece. Tried a call using my headphones and everything was working fine. Came to a conclusion that the problem is with the iPhone’s earpiece. I knew that keeping the phone in uncooked rice can help but this time it did not help. Had a close look at the earpiece and thought sandpaper might help. I did not have any sandpaper so tried a toothbrush. I was 99.9% sure that it will not help but still I rubbed a new toothbrush on the earpiece for just 5 seconds. I knew it wont work so kept my phone aside and started working. Five minutes later, I got a call and VOILA, clear sound with no issues whatsoever.
So rubbing a toothbrush on my iPhone 6 earpiece did wonders and fixed the low voice problem. Try this if you face the same issue. It can work.