Correctly setting the retractions is essential to minimize the risk of stringing and clogging, and to do this you will also need to take into account another parameter: the minimum distance for activating the retract function.

Retraction speed If you retract too quickly, the filament may separate from the hot plastic inside the nozzle, or the quick movement of the drive gear may even grind away pieces of your filament. There is usually a sweet spot somewhere between 1200-6000 mm/min (20-100 mm/s) where retraction performs best.