Gerber Edge Owner's Manual page 42

Maintaining Print Quality 37
Cleaning the printhead and squeegee.
Contamination buildup occasionally occurs on the printhead element
itself (the brown strip surrounded by the green mounting area in the
printhead). When this happens, printing quality is degraded and a more
thorough cleaning is necessary. We suggest cleaning the printhead
element weekly or as required. Use the Thermal Printhead Cleaning Kit
provided with your GERBER EDGE. If you need additional cleaning
kits, contact your Gerber distributor or the Gerber Field Service
Department.
Clean both sides of the foil squeegee with a lint-free cloth moistened
with isopropyl alcohol. Allow to air dry before loading a color cartridge.
Note: Isopropyl alcohol may discolor the squeegee over time. Discoloring does
not affect the operation of the squeegee.