I'm trying to replace a USB-A plug. One of the holes won't clear. It's like there's some kind of jam in there or something. I've tried wick, solder sucker, pushing a solid core wire through, pushing a fine tip iron through. Nothing works. It's actually two holes that were blocked. Only one I managed to push a solid core wire through. The bottom left one remains completely blocked. Nothing is working. Is there anything else I could try?