ITP01/A40 How to do when the printing content is not clear?

1. Please check whether the printer cover is tightly closed, and cover it tightly;

2. Please check whether the print head is dirty, and wipe it with alcohol cotton, or slightly damp facial tissue or towel;

Demo video：http://u.pc.cd/s6C7

3. Please change the print density from low to medium to high density, and try to print it out for comparison.