3D printer stringing

We all know it and we do not like it: STRINGS! We wrote down an illustrated problem solving method for this stringing issue. So our print on our test printer, the ender 3 pro, came out really stringy and just not good Our first thought was either a wrong temperature or wrong retraction speed (or both!) So, that is what we are going to test. In our second attempt we changed the temperature from 230 degrees Celsius to 220 degrees Celsius, because when the filament is too hot, it might keep dripping a bit (in this case PLA) and becomes a string. We changed the...