My laptop's headphone jack isn't working correctly?

I've had my laptop for a few years now, and lately I've noticed that the headphone jack only registers my headphones half the time. It doesn't matter what set of headphones I use. If I plug them in, they'll usually work at first, but if I move the laptop or the cord at all they'll stop... show more I've had my laptop for a few years now, and lately I've noticed that the headphone jack only registers my headphones half the time. It doesn't matter what set of headphones I use. If I plug them in, they'll usually work at first, but if I move the laptop or the cord at all they'll stop registering in the computer. I'll have to twist or wiggle the plug until it works again. This is really annoying to deal with all the time. Could someone tell me what's wrong and what I could do to fix it?
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