If it is only external, heat to 230-240 C and use a brass brush to clean it off.
If it has also clogged inside, heat to 230-240 C and run PETG through to push it out. PETG has a higher melting point than PLA.
If even that doesn't work, hubby said something about doing a hard pull, but not sure exactly how he does that, so I'll leave it up to others to explain.
@Prunebutt
If it is only external, heat to 230-240 C and use a brass brush to clean it off.
If it has also clogged inside, heat to 230-240 C and run PETG through to push it out. PETG has a higher melting point than PLA.
If even that doesn't work, hubby said something about doing a hard pull, but not sure exactly how he does that, so I'll leave it up to others to explain.