printer squeeze out bad plastic

[kolrom]

at the beginning the printer printed well, now it squeezes out a little plastic, put test files, the same thing, in standby mode the plastic itself falls out, and when it starts printing, very little comes out. can the printer be reset to factory settings.

[William]

Hello, there may be a blockage on the hotend, you can clean it up, please refer to the video link below.
https://www.youtube.com/watch?v=Xl8XwRm_BWE