I' ve got a Creality Ender 3 which was working very well until today, but this morning I've found a problem that I don't know how to solve. Last night I left my Ender printing a project and this morning I've found that only half of the project had been printed and the filament coming from the coil was cut. So, I thought that I should put the filament again inside the tube that goes to the hot end, but I can't do it because when I have slided 3 cm. into the tube, it collides with the remaining filament that is already in the tube. I can't remove the rests of that filamente because I can't reach it in any way that I can think of. Additionally, I think that the hot end is kind of stuck, because if I start a new printing, the hotend starts moving but no filament seems to appear. I don't know what to do right now. Any idea what I can do? Thanks in advance.