Does anyone know how to clean the tension area of this type of machine? (someone once said to use a dollar bill, but that dosen't work either.) I can sew for a little while and then it makes some weird type of noise and then when I stop and look the thread has shreded to a little ball just before going to the needle, it will then just break. When you try to pull it, its like stuck in the tension area. I have tried all types of thread and still can't make it work. Please help me! This is one of my favorite machines that I keep up all the time and use constantly. But just can't handle the probs.