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Best way to clean the nozzle


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Posted · Best way to clean the nozzle

Hi all,


Happy printing again, this time with CPE and fine results.


After printing a while, the nozzle gets cluttered up in filament. CPE is very stringy and produces some candy floss while printing. This becomes a problem after switching colour when it keeps making stains in the old colour through the new colour. So I need to clean the nozzle properly at the outside.


So, question: what is best practice for cleaning the nozzle easily when switching colours?




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    Posted · Best way to clean the nozzle

    Do you mean cleaning the outside cone, or the inside, or both?


    After each print I immediately wipe the outside with a thick tissue, while it is still hot, so it is clean immediately. If material is burnt onto it, and I can't wipe it off, I use a brass M3 screw thread to carefully file off the ashes. Use brass or copper, never steel, because steel would damage the sensitive cone. And always be very carefull and gentle.


    Also, regularly applying teflon and/or PTFE to the outside helps reducing build-up of goo on the outside.


    I clean the inside with atomic pulls during each material change, to remove all old color, and any burned-in material. See my method here:




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