Why are there some white spots in the printed labels?

A. It is might be the printer head has gotten dirty.
(1) Please turn off the printer and allow it to cool down

(2) Please use the provided alcohol pads to wipe the printer head clean. Any 70% Isopropyl Alcohol pad would work. These are commonly available in pharmacies and grocery stores as well as on Amazon. Image below shows the highlighted areas that could cause this fade / dead zone.

(3) Allow 2-3 minutes for components to dry, then turn it back on.
Finally, it is possible that something has interfered with NT-LP110A’s driver. If you exclude above reason, please uninstall the printer, restart your computer, and install the driver:http://www.gzxlscan.com