I haven’t used my printer for about two weeks. I have a flashforge creator pro and when I use my left extruder that has pla in it sometimes it will print the first layer fine and other times it won’t. When it prints the first layer fine it gets stringy mid print. Could it be the filament is dusty or is there a partial clog? When I use the right extruder it prints fine. http://ift.tt/2bfoO38