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I just started my first print with the new upgrades on my RM2 (a 20mm calibration cube), and It started just fine, but when I checked on it a few minutes later, no filament was coming out of the nozzle.
I removed the old filament and decided that my hotend was most likely clogged. But when I tried the tricks online and in these forums, none of them worked, and I got no extra filament when I pulled the filament back. This leads me to believe that it isn't clog. But if it isn't a clog then what is it? And if it is a clog, what could have caused this, and how do I clean it?

see: http://forum.seemecnc.com/viewtopic.php?f=37&t=11366

I read that topic before I posted my problem, and I read it again. The only thing I see in that article that will help me, is how to prevent clogs from happening again. In that topic, you discuss the build up of plastic in the heat break where the gap between the bowden and the end of the heat break is. But the build up of plastic prevents me from pushing the bowden down all the way, and obviously, extruding filament. But, in order to clean the heat break, you have to be able to melt the plastic inside. How do I heat up the heat break in order to clean the built up plastic?