usb3 port not fully working?

I picked up a used laptop. On the left side there are 2 usb 3 ports and on the right side there is 1 usb 2 port. One of the usb 3 ports will not find any kind of storage devise (external hard drive, memory stick) - it does work fine when I plug the remote 'dongle' thingy for my wireless mouse into it. The other 2 usb ports appear to work fine.

Any ideas as to how to get this port fully functional would be appreciated! Is there a good way to clean the terminals?
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  1. Ok - i got no replies but in case anyone is interested - i gave the port a quick shot of contact cleaner and it seems to be working fine now.
    Reply to robert600
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