• Lift up the cover as marked in the image.
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• Release the print-head by lifting up on the lever.
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• Firmly wipe the circled area with a bit of rubbing alcohol using a microfiber cloth. Continue this process until debris/color pigment has been removed. 
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• Lightly push the head down and pull the lever back down to lock the head back in place.
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• Push the pause button on the printer to clear the print-head error message from the display. 
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• The printer is ready for use.