Delonghi dinamica ecam 350.55.b milk dispensing tube

Hello, I wanted to clean my complete milk container the other day, and I also pulled off this metal tube from the rubber (directly at the output), because I thought that particles also settle there. Ab gin he actually quite well, however, again on it, no chance. As soon as one pushes the metal tube something only on it, pushes itself also the rubber with nevertheless, and smears folds before the metal, and it does not go further.

Have also already looked for a spare part, so this complete output tube, which can be pulled off to clean yes above in the milk container lid. Only I do not find this spare part of this machine, but always the same the complete Milcbehälter. Can not be that because of the one part a milk container for 40 € must be bought.

Or does anyone have a tip on how I get the tube back on the rubber?

Done