You know, i did that.. or tried.. I have cleaning filament... so i ran the temp up to 260 and tried to run it through, JAM, repeat, JAM, repeat, JAM... then i ran through PLA and it flowed quite well.I pushed more and more through and it ran well. so im testing a print again.
I think the way i cleaned nozzles in the past was to use a blow torch and heat the tip than tap it to get gunk out. Cleaning them out is just such a mess.
I think though when i get my taz 5 tomorrow, first thing ill do is test the print, and if all is good, perhaps ill buy another single nozzle print head for use with only ABS, this one for PLA and so on.