Just received my 2.9″ ESPaper Plus Kit, but it has what appears to be a squashed bug or piece of black fibrous dust on the Ink screen. But it is not dust. When I turn the kit on and it goes through it's initial screen refresh, displaying the SQUIX logo, and inverting the display colors, the dust also inverts to white on black with the rest of the display, then back to black on white, with the rest of the display. This splotch is the size of an "o" on the display, to the right of the ".org" and below the "s" in "Display".
Any suggestions on how to fix this?