My FW was working very good..I was going to start a new project and thought that I had not cleaned and oiled it for some time. So I took off the metal plate and cleaned off the fuzz and oiled the parts that needed oil replaced the plate and rethreaded the machine. I started to sew on a scrap and the thread started breaking...changed the needle, still broke, changed the thread, still shredded. So could I have done to it??