The printer head keeps breaking for the dual extension and the the normal one nozzel one

Plastic keeps coming out of the top of the nozzle instead of where it should come out leading to the entire thing getting clogged. This has happend to both extrusions, and its getting really annoying having to buy new extrusions which are expensive. Does this just happen with the extruders?

Why not simply tighten it with a wrench?

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I’m not quite sure what you mean by your title, but it sounds like your dual extruder is having issues, and your single extruder keeps leaking out the back end of the nozzle?

Firstly, make sure you have the catches fitted to the dual extruder to keep the nozzles in place. Otherwise then can work loose.

For the single extruder, tighten your nozzle with a small spanner, and do it while the nozzle is hot.

Photos or a more detailed description would be handy for helping solver your problems.