I was thinking that you could insert a couple of lines of code so that when the bed and extruder have reached working temperature, the print is paused while Z goes to 10mm; the extruder spits out 10mm of filament to clear its throat, and then Z returns to the start position and away we gooooooo!

You can slip in some code if you open your Gcode file using Notebook, insert your code and then save, using the same file name you started with.

OME