Had my ender 5+ for a few weeks now, printed some already amazing things. Recently I've been trying to print taller items. When they get to about 10cm+ the nozzle starts to hit the already extruded layers, which then of course knocks everything out of place and we get spaghetti.
I always level the bed before prints. I've greased the z axis threads a little. I did notice the left Z motor clamp was slipping, however have adjusted it and the problem persists.
I always use Z Hop on my prints, however since it isn't knocking on retraction but on extrusion this won't make a difference...