Hello my name is Ryan, I have a 2015 macbook. My problem is the USB on the left smells like it's burning, i'm curtained that it's the USB because the usb for the mouse smells the same way the mac USB smells. The mouse USB as looks a little bit burnt, and inside the mac usb there is blue stuff inside. Even though the usb for my mac still works i'm concerned. Any ideas what the problems is? Any solutions for this problem?