My 5S has reached the point where about 50% of the time, it won't register that it's been plugged in to charge or sync until I push hard on the Lightning plug. Would this be a symptom that it needs a new Lightning connector, or could it be something else? It's not the cable, BTW - it's the same with any cable I use, even brand-new ones. And I've used the toothpick trick to clean the crud out of the port, it's as clean as a whistle in there. First time I tried it, I was shocked by how much fluff and other debris came out.