Pay attention to UV flat-panel printer during use. For example, before shutting down, the user should first confirm whether the print head of the UV flat-panel printer returns to the initial position. Do not rush to shut down and unplug the power in a hurry. The advantages of this are: on the one hand, it can prevent the UV flat-panel printer from cleaning the nozzle again when it is turned on next time, resulting in a waste of ink; On the other hand, because the nozzle can be sealed by the protective cover in the initial position, the print head will not be so easy to cause blockage.