Gday All,

Ok since 3 days ago all my prints off either extruder are nowhere near as smooth as previously, yet have changed no filament or settings..Any suggestions ?

Secondly both extruders have build up of black ? on outside of them, could this be affecting my heating / cooling which in turn is affecting print quality.

Thirdly have noticed if printing a vertical tube, there is an uneven seem the entire way from bottom to top in one straight line ??

Have no idea whats happened

Steve