Available Monday through Friday from 7AM to 3:30PM CET Please create a ticket before calling and keep the ticket number at hand. At the moment we are only offering support in English, so we kindly ask you to address your issue in English.
Try printing with a higher temperature. What kind of plastic is it and what temperature did you use? If you use for example a temperature of 220 degrees Celsius and the fan is on, the resulting printing temperature will be around 210 is my experience. So put the temperature in a way that it never comes below 190 for PLA.