On all printheads manufactured before the month of May, 2023, there is a defect flaw in the design of the part cooling duct that causes it to sag below the nozzle, potentially dragging along the print. A new design fixes this issue, involving a new part cooling duct and cold end duct which significantly stiffens the fan assembly.
...
Step 1: Remove Printhead
Follow guide How To Install and Remove A Printhead to remove the printhead.
...
On the cold end blower, peel back the corners of the magnetic shielding foil to expose the M2 screw heads. Using a 1.5mm Allen remove the cold end blower, you may need to use flush cutters or tweezers to hold the M2 nuts from spinning.
 |   |
|---|
Step 6: Prepare Part Cooling Duct
Snap off the support and brim from the duct
...
...
 |  |
|---|
Using a knife or file, clean the edges of the duct from excess plastic
...
Reusing the previous M2 hardware, fasten the cold end blower to the new duct, and smooth down the magnetic shielding foil.
...