My new favourite 3D printer bed leveling method

Should I heat the extruder when bed leveling, or leave it cold?

 

If hot, how do I deal with oozing filament?

This is my new method which addresses these issues.

3D Printing: filament grinding & nozzle blockage

My printer stopped printing part way through a print!

 

I'd never experienced this before...

...and I'm still not sure what the reason was for this problem.

3D Printing: time to replace the nozzle?

During the last 7 or 8 days, something bad has happened.

 

My 3D printer has been producing rubbish.

Something rather unexpected seems to have solved my problem.