this happen when i used a new filament batch.
symtoms :
see attach, skip lines, more skips on higher layers.
too much clicking, sometimes 2-3 every few seconds. sometimes 2-3 clicks every 10-15secs.
small / debris / grinds on extruder mount, some on platform.

what i have done :
adjust filament size, measured actual, set average diameter + 1mm
adjust temperature, increase to 240 from 225-230.
slowed speed. 65 mm/s to 40mm/s
change filament to older stock.
clean nozzle, #1, #2 using

tested load new filament for 20-30sec. filament come out. but its not perfectly round, its spiral / wriggly.

still clicking and skipping infill and outline.

what seems to be the problem?
2014-09-02_16-21-21_375.jpg