1. Turn off the printer power.
2. Open the printer shell and raise the print head.
3. If the printer is working in thermal transfer mode, you need to remove the ribbon to expose the print head.
4. Gently wipe the print head with a cotton ball containing absolute alcohol to remove dust and dirt on it.
5. After the alcohol evaporates, the printer can be reused.
Note: During the cleaning process, remember not to scratch the print head. Regularly maintain barcode print heads