No matter whether we buy Apple charging cables or the licensed corded cables, they always seem to stop working - and I think the connector port is the issue. I've been getting ads for magnetic chargers recently - the kind that come with a small fitting that sits permanently in the port and connects to the cable with a magnet which would possibly solve the problem but DH is worried the magnet might damage the iPad - has anyone used them, and if so, are they worth it?