How to Clean Your Printhead on a Mobile Printer 

Maintenance is a crucial part of owning a thermal printer. One feature you will need to regularly check and clean is the thermal printhead. This is where the heat is applied to the label substrate or a thermal ink ribbon to produce an image. 

Ink residue gradually builds up on the printhead, which can alter the print quality of your labels. By regularly cleaning your printhead, your labels will print clean, crisp, and clear images. 

Below are step-by-step instructions on how to clean the thermal printhead for a mobile printer.

How to Clean Your Printhead on a Zebra QLN420 

  1. Get a thermal printer cleaning swab
  2. Open the printer
  3. Gently wipe the printhead to remove any ink residue

Thermal printer cleaning swabs are similar to q-tips. They consist of a short, thin plastic rod with a cotton swab at the end that contains alcohol for cleaning. Don’t have a thermal printer cleaning swab?

  1. Dampen a microfiber rag with 70% isopropyl alcohol 
  2. Wipe the printhead to remove any ink residue