I am experiencing a similar problem with my Pod GO psu. Thinking of trying a glue gun to reinforce & insulate the exposed wires. The fraying is happening right next to the so-called strain relief that emerges from the block. It’s a shame that the magnetic choke isn’t removable since I would’ve preferred to slide some heat-shrink along the wire. There doesn’t seem to be a way of easily disassembling the unit to replace/resolder the wires. It’s a bit crap, really…