I bought a Singer Simple sewing machine at JoAnn's about 3 months ago to carry to quilt classes. The other night I used the zig zag setting for the first time on some applique. At first it did great, then it start skipping anywhere from 2-6 stitches at a time (or making a straight stitch instead of zig zag). There was no rhyme or reason to it. At first I thought it was just when I was going around curves, but then it did the same thing on straight lines of stitching. I tried various adjustments and settings but nothing solved it. It was totally inconsistent, working fine for a bit and then off a bit, with no way to predict when it was going to mess up. Has anyone had this problem or know a fix for it, short of an expensive repair bill? I checked with Joann's and they won't let me swap it cause it's been 3 months since the purchase.