Hi there Unfortunately our Ultimaker3 has been a troublemaker. Hoping that it will help, I cleaned both printcores, use only UM3 Material and almost all the recommended settings. After cleaning, one print was absolutly awesome. The next print, not really what we are looking for; Something like fringe and spidercombs. What are we doing wrong? How can we fix that issue? thank you very much for your help, appreciate it a lot!