Inherited this machine from my sister who passed away last year. Machine has done well for me for the past year, however I now have a problem with the bottom thread. It is stitching loose and although I can still use it (thank God - making Christmas projects) I have not been able to correct it. Have rethreaded, put in a new needle, tried different stitches, etc. It still returns to making poor bottom stitches. Any suggestions? Thank you very much. Mary
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