<https://community.ultimaker.com/topic/16124-why-is-retraction-distance-set-to-65mm-in-cura-231/#comment-165079>
<http://schema.org/text>
"Did you check you extrusion? If you're over-extruding, the previous layer might be slightly thicker than what the software had planned, making the nozzle to drag over the previous layer. "
<https://community.ultimaker.com/topic/16124-why-is-retraction-distance-set-to-65mm-in-cura-231/?tab=comments#comment-165155>