If you feel your cell phone isn’t charging as fast as it used to it could be a build up of lint in the port. This can block charging or even failed charging. To fix this, power off your phone then used a wooden toothpick to clean debris from the port. Wood is nonconductive and is safe to use. Scrape lightly along the sides and bottom tilting the phone until the lint falls out. STOP if you feel any resistance! Now charge your phone, you should see the improvement immediately.