1. Check if there is any paper jammed or folded inside the device, if yes, please cut off the front part of the paper roll.
2. Check the power through APP. Low battery may cause blurred printing, please charge in time;
3. If the print is all missing or blurred in the horizontal position, check if there is any foreign body in it. If yes, please clean the print head with alcohol or a little water after turning it off and use again after it dry out
4. Partial missing may be caused by the failure of the device’s connection signal. You can try to replace the phone to test whether it is normal. If the print is still missing, please feel free to contact us.