no i mean on the usb stick itself on the back there are settings and one says reset
I've had the same problem with a stick not mining when I'm changing voltage. I find that turning the adjustment screw back to default works, sometimes it takes a few attempts and use no higher than 300 with good cooling / 150 without.
EDIT: Several times I've thought I'd killed a stick only for it to come back to life after a small screw / voltage adjustment .