3D Printing

Is part of the print lifting from the bed during print? That happens sometimes and it would make the nozzle dig into the already printed layers on that side

Looks like a bed-leveling issue to me? Maybe theres a high point and the nozzle is crashing into the print at that positon.

Absolutely looks like nozzle dragging over your layers. Bed uneven for some reason? Uneven heating? Plate not sitting flush? Nozzle loose?

Wash your build plate with dish soap. Rubbing alcohol isn’t enough long term.

Thanks all. I will look closely while its printing to see if anything is lifting. I do a bed level every print

Others have said similar, but make sure the nozzle doesnt plunge into the work and the work doesnt ride up. Bed adhesion, leveling, ect.

If your nozzle is extruding clean, unlevel bed like everyone is saying. Temps too high or low, cheap filament potentially, speed too high or low, work surface shifting under print movement. While I don't have experience printing, I have laser experience and when I get poor results it is often on of those. These systems somewhat go hand in hand.

@dom You sure it's just the top layer? That looks like rubbing that might occur when something's warping off the bed or when the bed isn't leveled. In those cases, it would likely be present in more than just the top layer.