Hisense HM626R User Manual page 19

③Precautions for daily maintenance
 Make sure that the power supply is turned off during routine maintenance of the printing
unit;
 Do not touch the surface of the print head with your hands and metal objects, and do not
use tweezers or other tools to scratch the print head, printing rubber roller and sensor surface;
 Do not use organic solvents such as gasoline and acetone;
 After the cleaning solution is completely evaporated, turn on the power to continue
printing;
 The maintenance period is recommended not to be longer than 1 month.
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