you need to use the right needle-one specifically for metallic threads- and only cut your thread 12"-18" max at a time- the thread frays as it goes through the fabric- the shorter length allows you to use it before it frays too much. it might seem like it saves time to have longer threads on your needle- but shorter lengths save constant frustration with fraying/knotting/tangling threads- so actually saves time in the long run....and the correct needle for the job also makes a huge difference in outcome