Sewing machine mystery.
I have a Juki straight stitch machine. A few months ago it was giving me fits, skipping stitches, bad tension, just being contrary. I cleaned it, change the needle, change thread still the same problems. I left it as is and used another machine on another table. Yesterday I decided to try it again and figure out the problems. It sewed perfectly. Nothing was changed on it never even unplugged it. So frustrating. How do I fix something that decides on it's own when to be fixed. LOL