Hope you don't mind me starting a thread with your great tip.
Never pull your thread out from the top; always cut it and bring it through the needle. This well help keep the tension disks clean as well as the rest of the innards. Thread has a grain and if you pull it out from the top you are leaving thread "dust bunnies (lint) behind in the innards of your machine. There is a little thread waste doing this but well worth it to keep machine up and running properly and no tension problems. Connie1948
Great tip!!!! I will start doing that today. It makes prefect since.