Hi everyone. I'm fixing my hot end issues and can't get these little black clips back inside of the fittings for the filament hose. Is it just a pinch and push sort of deal?

I messed up and left a print unsupervised for too long. I had a glob build up into the hot end and shroud. When I pulled it out, the wiring came with it. I tried to put it back on the left screw on the hot end.

I get a beeping on the display saying the temperature is not hot enough.

Easy fix? What do I need to buy? (Other than a new type of printer)