I've never worn one out but I've had to replace two after they got filled with sand (once from being dropped on the beach and once just from my pocket I think).

I've never worn one out but I've had to replace two after they got filled with sand (once from being dropped on the beach and once just from my pocket I think). No amount of cleaning would fix them, luckily with cheap Chinese phones one ebay search and €10 later I had a new charging port board.