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Hello
We have a Delta wasp 2040 with an LMD extruder.
At the end of the paste printing test (pH of the paste is strongly alkaline), we have surprised by the blocage of the cap of the tank. is there anyone know a method can we use to open this blocked cap.

Note :
The paste has a cementious nature.
The blocked cap is that connected to the extruder
The tank type: Tank Clay 3L (aluminum tank for dense fluid materials)