This, its amazing how much stuff ends up in there and then gets compressed in with the cables being plugged in. Back in my iPhone 5 days i was very close to taking it back to Apple to see if they could fix an issue when someone suggested i give it a clean. Dragged out loads of stuff and worked fine after that. Since then i've occasionally cleaned out the port on phones and done it for others having issues.Have you tried cleaning out the lightning port with a wooden toothpick? It fills with lint and sometimes won't just blow out with air.
Have you tried cleaning out the lightning port with a wooden toothpick? It fills with lint and sometimes won't just blow out with air.