Photo Credit: Courtesy of 3DStockPhoto ( image)
You could experiment with the 'cleaning' part of the startup gcode shown here
G1 X100 Y0 F4000 ; move half way along the front edge G1 Z1 ; move nozzle close to bed M109 S200 ; heat nozzle to 200 degC and wait until reached G4 P10000 ; wait 10 seconds for nozzle length to stabilize G1 E10 ; extrude 10 mm of filament G1 z15 F12000 E5 ; move 15 mm up, fast, while extruding 5mm G92 E0 ; reset extruder
I'm not completely persuaded that it helps a lot, but the idea is to fill the extruder (with some pressure from the bed at a 1mm gap) right before starting the skirt. Typically, I still find the first line of skirt may be quite blobby, but a 2nd line of skirt seems much better. Obviously you need the bed alignment right too. A raft seems to have enough 'extra' extrusion to mask these issues a little bit.