They have the tools and know-how to clean the port without harming it.
Here are a few places to try.
Apple says not to use compressed air, so you have to make a judgment call here.
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Some people say compressed air works just fine.
Too much air can damage the phone.
it’s possible for you to also use a hand-held vacuum like a mini vac or a dust buster.
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Cut the note into strips, making each strip narrower than the port.
Use the sticky side to reach in, connect with the loose debris, and remove it.
That’s because the charging port contains sets of pins, and those pins are fragile.
Once the pins are damaged, the only option is to replace the port.
To clean the port with a toothpick:
Hold the phone with one hand and the toothpick in another.
Gently insert the toothpick into the port.
Gently blow into the port to scatter the debris.
Repeat as needed, and test the port between tries.
What Clogs a Charging Port?
There are a thousand things that could gunk it up.
If you could look inside a clogged port, you’d see a wall of debris.
This debris, no matter what it is, collects on the pins inside the iPhone port.
It’s those pins that make the connection to the charging cable.
If there’s not a good connection, the phone won’t charge.
Cleaning this port releases that debris so that you’re able to charge the phone.