When do I know if I need a new needle in my machine? I've done a lot of quilting this summer, but I'm not sure how often I should change it.
Also, in the tutorial for the fabric bowl the suggested needle is a sharp 90. I'm trying to figure out what this is. I have a package of different size needles. They say 70/10, 80/12, & 90/14. Is this the 90 he's recommending?
TIA!!!