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Do not remove the gray-padded material around the silver filters.
Avoid touching the terminals, print head nozzles, and silver filters
on the print head unit.
The print head unit contains a clear liquid preservative that is
harmless; if it leaks onto your hand, wash it off.
Gently place the print head unit into the compartment with the
print head nozzles down, the terminals up, and the silver filters
facing the front of the printer.
You don’t need to press on the print head unit. When you close
the compartment cover, the print head unit becomes secure.
Chapter 4