Brother GTX600NB Instruction Manual page 216

The nozzle guard and suction cap should be cleaned separately for the white side and color side.
For the way to perform cleaning, refer to the respective items.
Perform cleaning of the white side.
Prepare a new clean stick R and the cleaning solution.
Nozzle guard
Cleaning
Prepare a new clean stick T and the cleaning solution.
Cleaning suction
cap
Perform cleaning of the color side.
Rinse the cleaning cup, and prepare a new clean stick R and the cleaning solution.
Nozzle guard
Cleaning
Rinse the cleaning cup, and prepare a new clean stick T and the cleaning solution.
Cleaning suction
cap
Clean the backside of the carriage.
Precautions to keep good printing quality/use printer over the long term
Perform cleaning of the nozzle guard part on the white side.
☞"Cleaning the nozzle guard (Use clean stick R) >>P.6-49"
After cleaning the nozzle guard part, remove ink clots, if any, protruding from the nozzle surface.
Perform cleaning of the suction cap part on the white side.
☞"Cleaning suction cap (Use clean stick T) >>P.6-52"
Perform cleaning of the nozzle guard part on the color side.
☞"Cleaning the nozzle guard (Use clean stick R) >>P.6-49"
After cleaning the nozzle guard part, remove ink clots, if any, protruding from the nozzle surface.
Perform cleaning of the suction cap part on the color side.
☞"Cleaning suction cap (Use clean stick T) >>P.6-52"
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