Thread wrapping around needle
Last night I noticed my top thread is wrapping itself around the needle and sorta creating a loose knot with the bobbin thread. Speed doesn't seem to be a factor as it does it both fast and slow. This machine is an 80"s model mechanical so no computer. Stitch length at about 2.5. Any ideas? I can still sew with it like this but its a bear when I remove the fabric from under the presser foot.