I’m so sorry for the delay in my response. Thank you so much for your patience.
We recommend using canned air as follows to clean the fan on the Printer Head:
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Turn off your Glowforge.
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Grasp the printer head as shown, and pull gently up and back to disengage the magnets and remove it.
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Use the “Install” end of the lens tool to push the lens all the way to the top of the head. This will reveal the inside of the fan.
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Use the canned air to blow the dust away from both sides of the fan until it’s clean.
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Clean the Printer Head Lens according to the instructions.
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Review instructions for snapping in your printer head, then put the head back on.
Let me know how it goes!