If you look closely to the bottom of your phone you’ll be able to see if there’s any dirt or dust. If you can see debris the next step you want to take is to find a thin poker you can stick in the port to scoop it out. Plenty of places recommend using a toothpick, but I don’t like to do that because toothpick can break off in the port if you are too aggressive. Instead, use a syringe to clean the dust by blowing air into the ports. We blew air into the port but did not notice any difference between before and after.