How to avoid white spots in my print

There are few reasons cause this problem:

Firstly, It is likely that the printer head has gotten dirty, please clean the printer head.

Secondly, the label paper is in poor quality, you have to get labels in better quality.

Thirdly, there is dirt on the label surface, you have to keep the labels well. 

Finally, it is possible that something has interfered with Aobio's driver. 

Please uninstall Aobio, restart your computer, and install the newest Aobio driver available on www.AobioPrinter.com