My HTC 10 is two weeks old. I carry it around in my pocket. Today on a long drive in the hot sun, it stopped charging from the car-charger. Once home, I checked the home charger as well--no charging. So I sprayed the USB-C port with compressed air, a can of "Ultra Duster" that I got at Office Max. I also used the open end of a needle to scrape gently around down inside the port. Never at any point did I see any dust, lint, or anything. But after a couple of swipes with the needle head, and sprays with the compressed air, I reconnected to the charging cord and it started charging.