It may be caused by dirty print head or uneven printing force.

In short, first wipe the print head with a cotton swab dipped in absolute alcohol.

If it doesn't work, it may be a broken needle. In that case, we can only find after-sales service.

So try to protect the print head when using it at ordinary times.

Prevent use in harsh environment, avoid using inferior consumables, and occasionally clean the print head.

We have G6000 with jewelry label on the counter. Because we usually pay more attention to maintenance, the needle has not been broken for two years now.