The Filament we use is from Gizmo Dorks, Prototype Supply, Makerbot, Deltamaker, its all PLA and are filament is off to the side so no preheat action is happening and it seems to roll fine and it all seems to be action the same but still it makes no sense cause as you see in the picture how the end bloats up, the heat block should melt it down but instead kinda just melts a tiny bit leaving that thread like end