I knot the threads on the loopers and then I cut the threads just below the needles and pull those two out from the top. My 1 and 2 threads are very easy to rethread. I pull the threads to the back, put the pressure foot down and holding on to the threads, I run it gently until the tail i am holding is all of the new color. Also if you must completely rethread the machine, start at the bottom and work your way up. It is something to do with when the loopers cross the upper threads.