Advertisements Have you tried a guitar pick? The ones I own bend far too easily to work, as far as I can tell. Now, it's possible that something thicker and less pliable-- e.g., old vending machine cards, old xerox cards, or old credit cards could work -- ones where it wouldn't matter if they snapped in two. They'd be more inflexible than the the guitar pick, permitting greater force! In any case, your recommendation of a plastic tool designed for the job makes sense. I would strongly advise against anyone using a screwdriver -- as I discovered, it's far too easy to mark, scratch, chip the edge of the case!