Brother GTX600SB Instruction Manual page 196

(6) Pull and remove the carriage foam toward you along the sliding surface of the foam guide after making sure that
the carriage foam is in contact with the surface of the foam guide.
(7) Put a proper amount of cleaning solution into the cleaning cup.
(8) Moisten a new clean stick R with the cleaning solution.
<IMPORTANT>

Use a new clean stick R when you start cleaning.

Never touch the tip end of clean stick R with your hand. If any sebaceous matter is attached to the nozzle surface, it may
malfunction the printer.

Do not use other fluids (water, etc.), because they may damage the print heads.

Do not return the cleaning solution which has been put in the cleaning cup to the cleaning solution bottle.

Do not shed cleaning solution in the maintenance unit.
<NOTE>

For a proper work operation, be sure to wear the printer-provided gloves.
Cleaning solution
Precautions to keep good printing quality/use printer over the long term
Carriage foam
Cleaning cup
Do not drain waste ink.
196
Clean stick R
Cleaning cup
X1000