The problem with them is the physical design. There is not enough support between the USB port and the pc board. The outside plastic housing doesn't get it done. Since there is little support the leads from the port break their soldered connection to the board. You have to look very closely to see connection is broken. They just require a quick touch with a soldering iron. This is why the wiggling seems to work. The small movements simply reconnect the leads temporarily. Product has been out for years,you'd think they'd have fixed it by now.