Print handwriting is very light

A: First proposed to use the cotton swab with alcohol to clean the print head, and then print to see the results.If the writing is still very light,please adjust the third switch of the bottom of the machine,set to “ON” position,the printer will use a deeper concentration to print.If the above process has been done is still ineffective,probably the printer has a long service life,Print head aging caused,Customers can return to replace the print head.