The label on the bottom of my registered device, Archer C7, is smeared and I can no longer obtain the device's default password. I was attempting to set up this device as a OneMesh device to my new Archer AX21, and one of the steps in the instructions said I had to factory reset in which I did. I never imagined the label on the bottom would have become smeared and/or smudged over time.  Please help!